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New Routemaster double-decker bus in London, United Kingdom
Volvo B5LH single-decker bus in Singapore
Youngman articulated bus in Ürümqi, China
New Flyer trolleybus in Toronto, Canada

A bus (contracted from omnibus,[1] with variants multibus, motorbus, autobus, etc.) is a motor vehicle that carries significantly more passengers than an average car or van, but fewer than the average rail transport. It is most commonly used in public transport, but is also in use for charter purposes, or through private ownership. Although the average bus carries between 30 and 100 passengers, some buses have a capacity of up to 300 passengers.[2] The most common type is the single-deck rigid bus, with double-decker and articulated buses carrying larger loads, and midibuses and minibuses carrying smaller loads. Coaches are used for longer-distance services. Many types of buses, such as city transit buses and inter-city coaches, charge a fare. Other types, such as elementary or secondary school buses or shuttle buses within a post-secondary education campus, are free. In many jurisdictions, bus drivers require a special large vehicle licence above and beyond a regular driving license.

Buses may be used for scheduled bus transport, scheduled coach transport, school transport, private hire, or tourism; promotional buses may be used for political campaigns and others are privately operated for a wide range of purposes, including rock and pop band tour vehicles.

Horse-drawn buses were used from the 1820s, followed by steam buses in the 1830s, and electric trolleybuses in 1882. The first internal combustion engine buses, or motor buses, were used in 1895.[3] Recently, interest has been growing in hybrid electric buses, fuel cell buses, and electric buses, as well as buses powered by compressed natural gas or biodiesel. As of the 2010s, bus manufacturing is increasingly globalised, with the same designs appearing around the world.

Name

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An early horse-drawn omnibus from mid-nineteenth century

The word bus is a shortened form of the Latin adjectival form omnibus ("for all"), the dative plural of omnis/omne ("all").[4] The theoretical full name is in French voiture omnibus[1] ("vehicle for all"). The name originates from a mass-transport service started in 1823 by a French corn-mill owner named Stanislas Baudry [fr] in Richebourg, a suburb of Nantes. A by-product of his mill was hot water, and thus next to it he established a spa business. In order to encourage customers he started a horse-drawn transport service from the city centre of Nantes to his establishment. The first vehicles stopped in front of the shop of a hatter named Omnés, which displayed a large sign inscribed "Omnes Omnibus", a pun on his Latin-sounding surname, omnes being the masculine and feminine nominative, vocative and accusative form of the Latin adjective omnis/-e ("all"),[4] combined with omnibus, the dative plural form meaning "for all", thus giving his shop the name "Omnés for all", or "everything for everyone".

His transport scheme was a huge success, although not as he had intended as most of his passengers did not visit his spa. He turned the transport service into his principal lucrative business venture and closed the mill and spa.[5] Nantes citizens soon gave the nickname "omnibus" to the vehicle.[1] Having invented the successful concept Baudry moved to Paris and launched the first omnibus service there in April 1828.[1] A similar service was introduced in Manchester in 1824 and in London in 1829.[6][7][8]

History

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Steam buses

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Amédée Bollée's L'Obéissante (1875)

Regular intercity bus services by steam-powered buses were pioneered in England in the 1830s by Walter Hancock and by associates of Sir Goldsworthy Gurney, among others, running reliable services over road conditions which were too hazardous for horse-drawn transportation.

The first mechanically propelled omnibus appeared on the streets of London on 22 April 1833.[9] Steam carriages were much less likely to overturn, they travelled faster than horse-drawn carriages, they were much cheaper to run, and caused much less damage to the road surface due to their wide tyres.[10]

However, the heavy road tolls imposed by the turnpike trusts discouraged steam road vehicles and left the way clear for the horse bus companies, and from 1861 onwards, harsh legislation virtually eliminated mechanically propelled vehicles from the roads of Great Britain for 30 years, the Locomotive Act 1861 imposing restrictive speed limits on "road locomotives" of 5 mph (8.0 km/h) in towns and cities, and 10 mph (16 km/h) in the country.[11]

Trolleybuses

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World's first trolleybus, Berlin 1882

In parallel to the development of the bus was the invention of the electric trolleybus, typically fed through trolley poles by overhead wires. The Siemens brothers, William in England and Ernst Werner in Germany, collaborated on the development of the trolleybus concept. Sir William first proposed the idea in an article to the Journal of the Society of Arts in 1881 as an "...arrangement by which an ordinary omnibus...would have a suspender thrown at intervals from one side of the street to the other, and two wires hanging from these suspenders; allowing contact rollers to run on these two wires, the current could be conveyed to the tram-car, and back again to the dynamo machine at the station, without the necessity of running upon rails at all."[12]

The first such vehicle, the Electromote, was made by his brother Ernst Werner von Siemens and presented to the public in 1882 in Halensee, Germany.[13] Although this experimental vehicle fulfilled all the technical criteria of a typical trolleybus, it was dismantled in the same year after the demonstration.[14]

Max Schiemann opened a passenger-carrying trolleybus in 1901 near Dresden, in Germany. Although this system operated only until 1904, Schiemann had developed what is now the standard trolleybus current collection system. In the early days, a few other methods of current collection were used. Leeds and Bradford became the first cities to put trolleybuses into service in Great Britain on 20 June 1911.

Motor buses

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In Siegerland, Germany, two passenger bus lines ran briefly, but unprofitably, in 1895 using a six-passenger motor carriage developed from the 1893 Benz Viktoria.[3] Another commercial bus line using the same model Benz omnibuses ran for a short time in 1898 in the rural area around Llandudno, Wales.[15]

Germany's Daimler Motors Corporation also produced one of the earliest motor-bus models in 1898, selling a double-decker bus to the Motor Traction Company which was first used on the streets of London on 23 April 1898.[16] The vehicle had a maximum speed of 18 km/h (11.2 mph) and accommodated up to 20 passengers, in an enclosed area below and on an open-air platform above. With the success and popularity of this bus, DMG expanded production, selling more buses to companies in London and, in 1899, to Stockholm and Speyer.[16] Daimler Motors Corporation also entered into a partnership with the British company Milnes and developed a new double-decker in 1902 that became the market standard.

The first mass-produced bus model was the B-type double-decker bus, designed by Frank Searle and operated by the London General Omnibus Company—it entered service in 1910, and almost 3,000 had been built by the end of the decade. Hundreds of them saw military service on the Western Front during the First World War.[17]

The Yellow Coach Manufacturing Company, which rapidly became a major manufacturer of buses in the US, was founded in Chicago in 1923 by John D. Hertz. General Motors purchased a majority stake in 1925 and changed its name to the Yellow Truck and Coach Manufacturing Company. GM purchased the balance of the shares in 1943 to form the GM Truck and Coach Division.

Models expanded in the 20th century, leading to the widespread introduction of the contemporary recognizable form of full-sized buses from the 1950s. The AEC Routemaster, developed in the 1950s, was a pioneering design and remains an icon of London to this day.[18] The innovative design used lightweight aluminium and techniques developed in aircraft production during World War II.[19] As well as a novel weight-saving integral design, it also introduced for the first time on a bus independent front suspension, power steering, a fully automatic gearbox, and power-hydraulic braking.[20]

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Types

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Interior of an articulated bus in Los Angeles

Formats include single-decker bus, double-decker bus (both usually with a rigid chassis) and articulated bus (or 'bendy-bus') the prevalence of which varies from country to country. High-capacity bi-articulated buses are also manufactured, and passenger-carrying trailers—either towed behind a rigid bus (a bus trailer) or hauled as a trailer by a truck (a trailer bus). Smaller midibuses have a lower capacity and open-top buses are typically used for leisure purposes. In many new fleets, particularly in local transit systems, a shift to low-floor buses is occurring, primarily for easier accessibility. Coaches are designed for longer-distance travel and are typically fitted with individual high-backed reclining seats, seat belts, toilets, and audio-visual entertainment systems, and can operate at higher speeds with more capacity for luggage. Coaches may be single- or double-deckers, articulated, and often include a separate luggage compartment under the passenger floor. Guided buses are fitted with technology to allow them to run in designated guideways, allowing the controlled alignment at bus stops and less space taken up by guided lanes than conventional roads or bus lanes.

Bus manufacturing may be by a single company (an integral manufacturer), or by one manufacturer's building a bus body over a chassis produced by another manufacturer.

Design

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Accessibility

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Portland, Oregon TriMet high-floor bus with wheelchair lift extended and lowered to the sidewalk/pavement (2010)

During most of the 20th century, transit buses were almost exclusively high-floor vehicles, and they used wheelchair lifts if they provided accessibility at all. (In the U.S., only in 1993 did accessibility become a requirement in all new buses, under the federal Americans with Disabilities Act of 1990.)[21] However, they are now increasingly of low-floor design and optionally also 'kneel' air suspension and have ramps to provide access for wheelchair users and people with baby carriages, sometimes as electrically or hydraulically extended under-floor constructs for level access. Prior to more general use of such technology, these wheelchair users could only use specialist para-transit mobility buses.

Accessible vehicles also have wider entrances and interior gangways and space for wheelchairs. Interior fittings and destination displays may also be designed to be usable by the visually impaired. Coaches generally still use wheelchair lifts instead of low-floor designs. In some countries, vehicles are required to have these features by disability discrimination laws.

Configuration

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Buses were initially configured with an engine in the front and an entrance at the rear. With the transition to one-person operation, many manufacturers moved to mid- or rear-engined designs, with a single door at the front or multiple doors. The move to the low-floor design has all but eliminated the mid-engined design, although some coaches still have mid-mounted engines. Front-engined buses still persist for niche markets such as American school buses, some minibuses, and buses in less developed countries, which may be derived from truck chassis, rather than purpose-built bus designs. Most buses have two axles, while articulated buses have three.[citation needed]

Guidance

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Guided buses are fitted with technology to allow them to run in designated guideways, allowing the controlled alignment at bus stops and less space taken up by guided lanes than conventional roads or bus lanes. Guidance can be mechanical, optical, or electromagnetic. Extensions of the guided technology include the Guided Light Transit and Translohr systems, although these are more often termed 'rubber-tyred trams' as they have limited or no mobility away from their guideways.

Liveries

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Transit buses are normally painted to identify the operator or a route, function, or to demarcate low-cost or premium service buses. Liveries may be painted onto the vehicle, applied using adhesive vinyl technologies, or using decals. Vehicles often also carry bus advertising or part or all of their visible surfaces (as mobile billboard). Campaign buses may be decorated with key campaign messages; these can be to promote an event or initiative.

Propulsion

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The most common power source since the 1920s has been the diesel engine. Early buses, known as trolleybuses, were powered by electricity supplied from overhead lines. Nowadays, electric buses often carry their own battery, which is sometimes recharged on stops/stations to keep the size of the battery small/lightweight. Currently, interest exists in hybrid electric buses, fuel cell buses, electric buses, and ones powered by compressed natural gas or biodiesel. Gyrobuses, which are powered by the momentum stored by a flywheel, were tried in the 1940s.

Dimensions

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United Kingdom and European Union:

Maximum Length: Single rear axle 13.5 meters (44 ft 3+12 in). Twin rear axle 15 meters (49 ft 2+12 in).
Maximum Width: 2.55 meters (8 ft 4+38 in)

United States, Canada and Mexico:

Maximum Length: None
Maximum Width: 2.6 meters (8 ft 6+38 in)

Manufacture

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Early bus manufacturing grew out of carriage coach building, and later out of automobile or truck manufacturers. Early buses were merely a bus body fitted to a truck chassis. This body+chassis approach has continued with modern specialist manufacturers, although there also exist integral designs such as the Leyland National where the two are practically inseparable. Specialist builders also exist and concentrate on building buses for special uses or modifying standard buses into specialised products.

Integral designs have the advantages that they have been well-tested for strength and stability, and also are off-the-shelf. However, two incentives cause use of the chassis+body model. First, it allows the buyer and manufacturer both to shop for the best deal for their needs, rather than having to settle on one fixed design—the buyer can choose the body and the chassis separately. Second, over the lifetime of a vehicle (in constant service and heavy traffic), it will likely get minor damage now and again, and being able easily to replace a body panel or window etc. can vastly increase its service life and save the cost and inconvenience of removing it from service.[citation needed]

As with the rest of the automotive industry, into the 20th century, bus manufacturing increasingly became globalized, with manufacturers producing buses far from their intended market to exploit labour and material cost advantages. A typical city bus costs almost US$450,000.[22]

Uses

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Public transport

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A Nishitetsu public bus in Fukuoka, Japan

Transit buses, used on public transport bus services, have utilitarian fittings designed for efficient movement of large numbers of people, and often have multiple doors. Coaches are used for longer-distance routes. High-capacity bus rapid transit services may use the bi-articulated bus or tram-style buses such as the Wright StreetCar and the Irisbus Civis.

Buses and coach services often operate to a predetermined published public transport timetable defining the route and the timing, but smaller vehicles may be used on more flexible demand responsive transport services.

Tourism

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Tour bus being used in France (2015)
A Transit Systems Scania K280UB at Westfield Miranda

Buses play a major part in the tourism industry. Tour buses around the world allow tourists to view local attractions or scenery. These are often open-top buses, but can also be regular buses or coaches.

In local sightseeing, City Sightseeing is the largest operator of local tour buses, operating on a franchised basis all over the world. Specialist tour buses are also often owned and operated by safari parks and other theme parks or resorts. Longer-distance tours are also carried out by bus, either on a turn up and go basis or through a tour operator, and usually allow disembarkation from the bus to allow touring of sites of interest on foot. These may be day trips or longer excursions incorporating hotel stays. Tour buses often carry a tour guide, although the driver or a recorded audio commentary may also perform this function. The tour operator may be a subsidiary of a company that operates buses and coaches for other uses or an independent company that charters buses or coaches. Commuter transport operators may also use their coaches to conduct tours within the target city between the morning and evening commuter transport journey.

Buses and coaches are also a common component of the wider package holiday industry, providing private airport transfers (in addition to general airport buses) and organised tours and day trips for holidaymakers on the package.

Tour buses can also be hired as chartered buses by groups for sightseeing at popular holiday destinations. These private tour buses may offer specific stops, such as all the historical sights, or allow the customers to choose their own itineraries. Tour buses come with professional and informed staff and insurance, and maintain state governed safety standards. Some provide other facilities like entertainment units[clarification needed], luxurious reclining seats, large scenic windows, and even lavatories.

Public long-distance coach networks are also often used as a low-cost method of travel by students or young people travelling the world. Some companies such as Topdeck Travel were set up specifically to use buses to drive the hippie trail or travel to places such as North Africa.

In many tourist or travel destinations, a bus is part of the tourist attraction, such as the North American tourist trolleys, London's AEC Routemaster heritage routes, or the customised buses of Malta, Asia, and the Americas. Another example of tourist stops is the homes of celebrities, such as tours based near Hollywood. There are several such services between 6000 and 7000 Hollywood Boulevard in Los Angeles.

Student transport

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US school bus (2007 IC CE)
School buses operated by U-go Mobility in Sydney, NSW

In some countries, particularly the US and Canada, buses used to transport schoolchildren have evolved into a specific design with specified mandatory features. American states have also adopted laws regarding motorist conduct around school buses, including large fines and possibly prison for passing a stopped school bus in the process of loading or offloading children passengers. These school buses may have school bus yellow livery and crossing guards. Other countries may mandate the use of seat belts. As a minimum, many countries require a bus carrying students to display a sign, and may also adopt yellow liveries. Student transport often uses older buses cascaded from service use, retrofitted with more seats or seatbelts. Student transport may be operated by local authorities or private contractors.

Schools may also own and operate their own buses for other transport needs, such as class field trips or transport to associated sports, music, or other school events.

Private charter

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An example of a private bus operating for BusWest in Perth (2018)

Due to the costs involved in owning, operating, and driving buses and coaches, much bus and coach use comes from the private hire of vehicles from charter bus companies, either for a day or two or on a longer contract basis, where the charter company provides the vehicles and qualified drivers.

Charter bus operators may be completely independent businesses, or charter hire may be a subsidiary business of a public transport operator that might maintain a separate fleet or use surplus buses, coaches, and dual-purpose coach-seated buses. Many private taxicab companies also operate larger minibus vehicles to cater for group fares. Companies, private groups, and social clubs may hire buses or coaches as a cost-effective method of transporting a group to an event or site, such as a group meeting, racing event, or organised recreational activity such as a summer camp. Schools often hire charter bus services on a regular basis for transportation of children to and from their homes. Chartered buses are also used by education institutes for transport to conventions, exhibitions, and field trips. Entertainment or event companies may also hire temporary shuttles buses for transport at events such as festivals or conferences. Party buses are used by companies in a similar manner to limousine hire, for luxury private transport to social events or as a touring experience. Sleeper buses are used by bands or other organisations that tour between entertainment venues and require mobile rest and recreation facilities. Some couples hire preserved buses for their wedding transport, instead of the traditional car. Buses are often hired for parades or processions. Victory parades are often held for triumphant sports teams, who often tour their home town or city in an open-top bus. Sports teams may also contract out their transport to a team bus, for travel to away games, to a competition or to a final event. These buses are often specially decorated in a livery matching the team colours. Private companies often contract out private shuttle bus services, for transport of their customers or patrons, such as hotels, amusement parks, university campuses, or private airport transfer services. This shuttle usage can be as transport between locations, or to and from parking lots. High specification luxury coaches are often chartered by companies for executive or VIP transport. Charter buses may also be used in tourism and for promotion (See Tourism and Promotion sections).

Private ownership

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Police bus in Taipei, Taiwan (2014)

Many organisations, including the police, not for profit, social or charitable groups with a regular need for group transport may find it practical or cost-effective to own and operate a bus for their own needs. These are often minibuses for practical, tax and driver licensing reasons, although they can also be full-size buses. Cadet or scout groups or other youth organizations may also own buses. Companies such as railroads, construction contractors, and agricultural firms may own buses to transport employees to and from remote job sites. Specific charities may exist to fund and operate bus transport, usually using specially modified mobility buses or otherwise accessible buses (See Accessibility section). Some use their contributions to buy vehicles and provide volunteer drivers.

Airport operators make use of special airside airport buses for crew and passenger transport in the secure airside parts of an airport. Some public authorities, police forces, and military forces make use of armoured buses where there is a special need to provide increased passenger protection. The United States Secret Service acquired two in 2010 for transporting dignitaries needing special protection.[23] Police departments make use of police buses for a variety of reasons, such as prisoner transport, officer transport, temporary detention facilities, and as command and control vehicles. Some fire departments also use a converted bus as a command post[24] while those in cold climates might retain a bus as a heated shelter at fire scenes.[25] Many are drawn from retired school or service buses.

Promotion

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Advertisement on a bus in Hong Kong (2018)

Buses are often used for advertising, political campaigning, public information campaigns, public relations, or promotional purposes. These may take the form of temporary charter hire of service buses, or the temporary or permanent conversion and operation of buses, usually of second-hand buses. Extreme examples include converting the bus with displays and decorations or awnings and fittings. Interiors may be fitted out for exhibition or information purposes with special equipment or audio visual devices.

Bus advertising takes many forms, often as interior and exterior adverts and all-over advertising liveries. The practice often extends into the exclusive private hire and use of a bus to promote a brand or product, appearing at large public events, or touring busy streets. The bus is sometimes staffed by promotions personnel, giving out free gifts. Campaign buses are often specially decorated for a political campaign or other social awareness information campaign, designed to bring a specific message to different areas, or used to transport campaign personnel to local areas/meetings. Exhibition buses are often sent to public events such as fairs and festivals for purposes such as recruitment campaigns, for example by private companies or the armed forces. Complex urban planning proposals may be organised into a mobile exhibition bus for the purposes of public consultation.

Goods transport

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A 1965 Mercedes-Benz LPO 322 Bruck in Karlskrona, Sweden (2005)

In some sparsely populated areas, it is common to use brucks, buses with a cargo area to transport both passengers and cargo at the same time. They are especially common in the Nordic countries.

Around the world

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Trailer bus in Havana (2006)

Historically, the types and features of buses have developed according to local needs. Buses were fitted with technology appropriate to the local climate or passenger needs, such as air conditioning in Asia, or cycle mounts on North American buses. The bus types in use around the world where there was little mass production were often sourced secondhand from other countries, such as the Malta bus, and buses in use in Africa. Other countries such as Cuba required novel solutions to import restrictions, with the creation of the "camellos" (camel bus), a specially manufactured trailer bus.

After the Second World War, manufacturers in Europe and the Far East, such as Mercedes-Benz buses and Mitsubishi Fuso expanded into other continents influencing the use of buses previously served by local types. Use of buses around the world has also been influenced by colonial associations or political alliances between countries. Several of the Commonwealth nations followed the British lead and sourced buses from British manufacturers, leading to a prevalence of double-decker buses. Several Eastern Bloc countries adopted trolleybus systems, and their manufacturers such as Trolza exported trolleybuses to other friendly states.[citation needed] In the 1930s, Italy designed the world's only[dubiousdiscuss] triple decker bus for the busy route between Rome and Tivoli that could carry eighty-eight passengers. It was unique not only in being a triple decker but having a separate smoking compartment on the third level.[26]

The buses to be found in countries around the world often reflect the quality of the local road network, with high-floor resilient truck-based designs prevalent in several less developed countries where buses are subject to tough operating conditions. Population density also has a major impact, where dense urbanisation such as in Japan and the far east has led to the adoption of high capacity long multi-axle buses, often double-deckers while South America and China are implementing large numbers of articulated buses for bus rapid transit schemes.

Bus expositions

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Euro Bus Expo is a trade show, which is held biennially at the UK's National Exhibition Centre in Birmingham. As the official show of the Confederation of Passenger Transport, the UK's trade association for the bus, coach and light rail industry, the three-day event offers visitors from Europe and beyond the chance to see and experience the very latest vehicles and product and service innovations right across the industry.

Busworld Kortrijk in Kortrijk, Belgium, is the leading bus trade fair in Europe. It is also held biennially.

Use of retired buses

[edit]
Retired bus in Israel used as a tow truck (2008)
A retired bus is used for an ambulance bus in Toronto (2014)

Most public or private buses and coaches, once they have reached the end of their service with one or more operators, are sent to the wrecking yard for breaking up for scrap and spare parts. Some buses which are not economical to keep running as service buses are often converted for use other than revenue-earning transport. Much like old cars and trucks, buses often pass through a dealership where they can be bought privately or at auction.

Bus operators often find it economical to convert retired buses to use as permanent training buses for driver training, rather than taking a regular service bus out of use. Some large operators have also converted retired buses into tow bus vehicles, to act as tow trucks. With the outsourcing of maintenance staff and facilities, the increase in company health and safety regulations, and the increasing curb weights of buses, many operators now contract their towing needs to a professional vehicle recovery company.

Some buses that have reached the end of their service that are still in good condition are sent for export to other countries.

Some retired buses have been converted to static or mobile cafés, often using historic buses as a tourist attraction. There are also catering buses: buses converted into a mobile canteen and break room. These are commonly seen at external filming locations to feed the cast and crew, and at other large events to feed staff. Another use is as an emergency vehicle, such as high-capacity ambulance bus or mobile command centre.

Some organisations adapt and operate playbuses or learning buses to provide a playground or learning environments to children who might not have access to proper play areas. An ex-London AEC Routemaster bus has been converted to a mobile theatre and catwalk fashion show.[27]

Some buses meet a destructive end by being entered in banger races or at demolition derbies. A larger number of old retired buses have also been converted into mobile holiday homes and campers.

Bus preservation

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Preserved 1965 AEC Regal VI formerly operated by the Metropolitan Transport Trust in Perth, Australia

Rather than being scrapped or converted for other uses, sometimes retired buses are saved for preservation. This can be done by individuals, volunteer preservation groups or charitable trusts, museums, or sometimes by the operators themselves as part of a heritage fleet. These buses often need to be restored to their original condition and will have their livery and other details such as internal notices and rollsigns restored to be authentic to a specific time in the bus's history. Some buses that undergo preservation are rescued from a state of great disrepair, but others enter preservation with very little wrong with them. As with other historic vehicles, many preserved buses either in a working or static state form part of the collections of transport museums. Additionally, some buses are preserved so they can appear alongside other period vehicles in television and film. Working buses will often be exhibited at rallies and events, and they are also used as charter buses. While many preserved buses are quite old or even vintage, in some cases relatively new examples of a bus type can enter restoration. In-service examples are still in use by other operators. This often happens when a change in design or operating practice, such as the switch to one person operation or low floor technology, renders some buses redundant while still relatively new.

Modification as railway vehicles

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See also

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References

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Bibliography

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
A bus is a large, self-propelled, wheeled vehicle designed to carry multiple passengers, typically more than 10, along fixed or flexible routes as part of public transportation systems, distinguishing it from smaller vehicles like cars or vans. In legal terms under U.S. federal regulations, a bus is defined as any motor vehicle constructed and used for transporting passengers, including those for school or intercity travel. Originating from the Latin word omnibus meaning "for all," buses provide accessible, shared mobility that serves urban commuters, rural communities, and tourists, often featuring capacities from 20 to over 100 passengers depending on the model. The history of the bus traces back to the early 19th century with horse-drawn omnibuses, first introduced in , , in 1826 by Stanislas Baudry as a public service carrying up to 16 passengers on scheduled routes. This model spread to in 1829, where George Shillibeer launched the first service, evolving into a key alternative to stagecoaches and streetcars by the mid-1800s. Motorized buses emerged in 1895 with the first gasoline-powered versions in , and by 1910, the mass-produced B-type bus in marked the transition from horse-drawn to engine-driven vehicles, phasing out animal power entirely in major cities by the 1920s. In the United States, the first gasoline-powered buses entered service in New York in 1905, while innovations like the 1925 Blue Bird laid the foundation for specialized variants. Buses play a vital role in modern transportation, accounting for a significant portion of public transit ridership and offering benefits such as reduced , lower per passenger compared to private cars, and enhanced for underserved populations. In , buses and coaches are classified as vehicles with at least four wheels built for carrying passengers, including standing room, and they transport millions daily while supporting through efficient mobility. Safety data highlights their advantage, with travel being 10 times safer than personal car use based on fatalities per passenger mile. Contemporary advancements include electric and hybrid models, with electric buses accounting for around 20% of new sales in leading markets as of 2024, to address environmental concerns, alongside designs like low-floor buses for improved since the 1980s. Overall, buses remain a cornerstone of sustainable , facilitating and reducing household transportation costs to about 16 cents per dollar spent as of 2024.

Definition and Terminology

Etymology

The term "bus" derives from the Latin word omnibus, meaning "for all," which was adopted to describe early public passenger vehicles designed to serve the general populace. In 1826, French entrepreneur Stanislas Baudry introduced the first scheduled omnibus service in , , operating horse-drawn carriages that carried multiple passengers along fixed routes to connect his steam-powered flour mill and public bathhouse with the city center. Baudry coined the name "omnibus" by drawing inspiration from a nearby hat shop owned by a man named Omnès, playfully adapting the Latin term to emphasize the vehicle's accessibility to everyone, regardless of . Baudry's innovation quickly expanded; by 1827, similar services were running in Bordeaux, and in 1828, he launched the first omnibus line in Paris, marking the beginning of organized urban public transport in Europe. The Paris operation, under the Compagnie Générale des Omnibus, standardized the concept, with vehicles featuring longitudinal bench seating for 14 to 16 passengers and fares accessible to the working class. This nomenclature reflected the egalitarian intent of the service, distinguishing it from private carriages or stagecoaches reserved for the elite. By the , the full term "omnibus" had been shortened to "bus" in English usage, initially referring to the horse-drawn vehicles but soon applied more broadly to public conveyances. The abbreviation gained traction in Britain following the introduction of omnibus services in in , where the term was anglicized and integrated into everyday language for mass transit. The transition to motorized vehicles in the late 19th and early 20th centuries further solidified "bus" as the dominant term, replacing "omnibus" for engine-powered models. The first motor omnibus appeared in 1895, built by Karl Benz in , and by 1901, "bus" specifically denoted motorized in English, reflecting technological evolution while retaining the original connotation of communal travel. Linguistic variations persist globally, with many Romance languages using compounds like "autobus" (from "auto" + "bus") to specify motorized versions, such as autobus in French, Spanish, and Italian. In English-speaking regions, "coach" often denotes long-distance or buses, distinguishing them from urban "buses," a usage that emerged in the mid-20th century to clarify service types.

Classification Terms

Buses are classified using various terms that reflect their intended function, structural design, capacity, and , providing a standardized vocabulary for and . These terms distinguish vehicles based on operational , such as urban transit versus , and evolving environmental standards. The term "bus" generally refers to a designed, constructed, and used to transport s, primarily for or urban short-haul services on fixed routes along and roadways. In contrast, a "motorcoach" or "coach" denotes a specialized bus for long-distance or , featuring an elevated deck above a compartment to accommodate luggage and provide luxury amenities like reclining seats and restrooms. This distinction highlights buses as optimized for frequent stops and high-volume local , while motorcoaches prioritize comfort and efficiency over extended journeys. A "" is a compact variant designed to carry up to 20 passengers, including the driver, typically built on a small for flexibility in low-demand routes, rural areas, or as feeder services to larger transit networks. Its smaller size—often under 25 feet in length—allows maneuverability in congested urban environments or narrow roads, distinguishing it from standard full-size buses that accommodate 30 to 60 passengers. For higher capacity needs, an "," commonly known as a "bendy bus," consists of two or more rigid sections linked by a pivoting , enabling lengths of 54 to 60 feet while navigating turns effectively in dense . This configuration increases throughput—up to 100 or more—without requiring additional , making it suitable for high-frequency urban corridors. A "" is an electrically powered bus with rubber tires that draws current from overhead wires through trolley poles, allowing zero-emission operation in urban settings powered by a central . Unlike traditional buses, it eliminates onboard storage, reducing noise and air pollution at the point of use, though it is confined to routes with overhead infrastructure. Emerging classifications address sustainability, with a "zero-emission bus" defined as any bus producing no tailpipe criteria pollutants, toxic air contaminants, or greenhouse gases during operation, encompassing battery-electric, , and wired electric () models. These terms reflect a shift toward fleets, as seen in policies promoting their adoption for public transit to mitigate impacts.

History

Early Innovations

An early precursor to modern public transportation services was established in 1662 when French mathematician and philosopher launched the world's first organized coach service in . Known as the carrosses à cinq sols (five-sol coaches), these horse-drawn carriages operated on fixed routes, carrying up to eight passengers each for a fare of five sols, and were pulled by teams of two horses. The service initially included seven vehicles running between key landmarks like the and the , marking a pioneering effort to provide accessible urban mobility for the general populace rather than just the elite. The modern omnibus, from which buses derive their name, was introduced in 1826 in , , by Stanislas Baudry. By the , innovations shifted toward powered alternatives to horse-drawn omnibuses, with buses representing an early attempt at mechanized . In , inventor Walter Hancock introduced -powered omnibuses in the 1830s, operating services such as the "Enterprise" route from to the starting in 1833, which carried thousands of passengers over regular schedules. Hancock's vehicles, like the "Infant" and "Era," featured compact cellular s made of and for efficient generation, allowing speeds up to 15-20 mph on turnpike roads. However, these buses faced significant limitations, including frequent malfunctions, explosion risks due to pressure inconsistencies, and the need for lengthy startup times of up to 30 minutes, which hindered reliability and passenger comfort. A further advancement came with the introduction of electric trolleybuses in 1882, pioneered by German engineer in . The Electromote, demonstrated on April 29 in the suburb of Halensee, was the first vehicle to draw power from overhead wires via contact wheels, using two electric motors to propel a carriage that seated 20 passengers at speeds of about 10 km/h. This trackless system eliminated the need for rails while providing cleaner, more efficient operation compared to steam, though it was limited to routes with fixed wiring infrastructure. The Electromote's successful trial run laid foundational groundwork for electric urban transport.

Motorization and Expansion

The transition to motorized buses commenced in 1895 when Karl Benz of Benz & Cie. in , , engineered the world's first bus for the Netphener Omnibus-Gesellschaft, which entered service on March 18 between Netphen, Deuz, and , carrying up to eight passengers over a 15-kilometer route. This innovation built briefly on prior steam and trolley experiments by providing greater reliability and range without dependence on fixed tracks or horses. By 1898, Daimler's company in Cannstatt had initiated of omnibus models, including a pioneering double-decker variant with a 20-horsepower engine, supplied to London's Motor Traction Company for urban routes and seating up to 24 passengers. The interwar period, particularly the 1920s, witnessed explosive growth in the bus sector following World War I, fueled by enhanced roadways, falling vehicle costs, and rising demand for flexible public transport. In London, the Associated Equipment Company (AEC)—established in 1912 as a subsidiary of the London General Omnibus Company—introduced key double-decker models like the S-type in 1920, which featured covered upper decks and influenced subsequent designs leading to the iconic Routemaster lineage, while bus journeys in the city surged to nearly 3 billion annually by 1930. Across the Atlantic, U.S. intercity services proliferated, with operators like Greyhound Lines expanding routes via streamlined coaches, culminating in over 7 billion passenger miles traveled by 1929 and connecting thousands of communities previously reliant on rail. World War II disrupted this momentum through stringent fuel , which reduced U.S. consumption by 32% between 1941 and 1944 and prompted adaptations like curtailed routes and shared rides to prioritize military needs. In , shortages inspired improvised fuel systems, such as generators using wood or to power buses, including experimental coal-gas trailers towed by vehicles to sustain urban services without petrol. reconstruction emphasized to rebuild efficiently, with manufacturers adopting modular and body specifications—exemplified by AEC's series in the UK and larger 60-passenger models in the U.S.—enabling and integration into expanding suburban networks amid the .

Contemporary Developments

In the early , (BRT) systems emerged as a key response to urban congestion and environmental pressures, building on foundational motor bus designs from the . Originating in , , in 1974, BRT features dedicated lanes, high-capacity vehicles, and priority signaling to mimic rail efficiency at lower cost. By 2000, approximately 40 cities worldwide operated BRT systems, but adoption accelerated in the , driven by needs for sustainable mass transit in rapidly growing urban areas. As of 2025, over 190 cities across six continents host BRT networks spanning more than 5,900 kilometers, serving approximately 32 million daily passengers, with accounting for the majority of ridership. These systems have reduced emissions in high-density corridors and enhanced accessibility, exemplified by expansions in cities like , Colombia, and Jakarta, Indonesia. The integration of digital technologies transformed bus operations and user engagement starting in the early , addressing urban mobility challenges through enhanced connectivity. GPS-enabled automatic vehicle location (AVL) systems, coupled with mobile applications, allowed real-time tracking of bus positions, estimated arrival times, and route alerts, significantly reducing wait times and improving reliability. By the mid-, agencies like and New York City's MTA had deployed widespread apps such as Citymapper and the MTA Bus Time, which integrate crowdsourced data and to personalize travel planning. This shift not only boosted ridership by up to 10-15% in adopting cities through better user confidence but also optimized via data-driven dispatching. The profoundly disrupted bus services from 2020 onward, prompting rapid adaptations to health and operational crises. In the , annual bus ridership fell to approximately 54% of 2019 levels in 2020, with unlinked passenger trips dropping from 4.64 billion to 2.53 billion amid lockdowns and shifts. Globally, similar declines occurred, with agencies implementing measures like enhanced ventilation, plexiglass barriers, and frequent sanitization protocols. systems saw accelerated adoption, rising from niche use to standard in many networks to minimize surface interactions; for instance, over 80% of U.S. transit agencies integrated tap-and-go options by 2022, sustaining post-pandemic recovery. By early 2025, U.S. bus ridership had rebounded to 85% of pre-pandemic levels as of May 2025, reflecting resilient demand in essential travel and hybrid work patterns.

Design Features

Structural Components

The structural components of a bus form the foundational framework that supports passenger capacity, safety, and operational efficiency. The serves as the primary load-bearing structure, while the body provides enclosure and interior space, with their integration influencing overall vehicle performance. Bus designs primarily fall into two categories: separate and () constructions. In the approach, a rigid ladder-like frame supports the , axles, and suspension, onto which a distinct body is mounted; this facilitates easier customization and repairs, commonly used in school buses and some transit models for its simplicity and cost-effectiveness. Conversely, integrate the body and frame into a single, unified structure, often using a shell where the body's stressed panels contribute to overall rigidity; this enhances durability, allowing buses to achieve service lives of 1-3 million miles with better and safety. exemplifies designs in its 9000 series coaches, where a frameless with a one-piece composite reduces overall weight by up to 350 kg compared to traditional setups, lowering the center of gravity for improved stability. Bus body materials have evolved significantly to prioritize reduction and resistance while maintaining structural . Early 20th-century buses relied on en frameworks for bodies, valued for craftsmanship but prone to rot and heavy; by the , replaced in frameworks and panels for greater standardization and strength, though it added requiring insulation like felt or rubber. Aluminum emerged in the mid-20th century for high-end panels due to its lighter —offering up to 36% mass savings over —but was initially limited by cost; and fabric alternatives further reduced panel s by 80-100 lb in medium-sized buses. Modern advancements incorporate composites, such as fiberglass-reinforced polymers in sandwich structures, enabling up to 14.1% reduction in frames without compromising safety or capacity; for instance, Ayats double-decker buses use infused composite window frames to meet stringent targets while enhancing . Common bus configurations vary by deck arrangement and articulation to accommodate different route demands. Single-deck buses, the most prevalent type, typically feature a straightforward rectangular layout with capacities of 40-80 passengers, balancing urban maneuverability and efficiency on standard 12-meter . Double-deck configurations stack two levels on a single , increasing capacity to 70-120 passengers without extending length, ideal for high-density routes like tourism or city centers, though they require taller structures up to 4.5 meters high. Articulated buses connect two rigid sections via a pivoting , extending lengths to 18-25 meters and boosting capacities to 100-200 passengers, suited for corridors where higher volumes justify the added complexity in and maintenance.

Propulsion Systems

Buses employ a range of systems to meet diverse operational demands, from urban transit routes requiring frequent stops to long-haul travel. Traditional internal engines (ICE) remain prevalent, but is accelerating due to environmental regulations and energy efficiency goals. These systems convert or stored energy into mechanical power via drivetrains that include transmissions, differentials, and axles, optimized for heavy loads and passenger capacity. Diesel engines have dominated bus until the , comprising the majority of global fleets owing to their high , , and cost-effectiveness for heavy-duty applications. In , the Euro VI standards, effective from 2013 for heavy-duty vehicles including buses, impose rigorous emission limits such as 0.46 g/kWh for nitrogen oxides () and 0.01 g/kWh for particulate matter (PM) to curb . These engines typically feature turbocharging and exhaust aftertreatment systems like (SCR) to comply with such norms, enabling reliable operation over 500,000 km with minimal downtime. variants, though less widespread due to lower in large vehicles, serve niche roles such as school buses where quieter operation and simpler maintenance are prioritized; the B6.7 Octane engine, for instance, delivers 200–300 horsepower and 520–560 lb-ft of while meeting EPA 2027 emissions. Electric propulsion systems eliminate direct emissions at the tailpipe, relying on electrochemical or stored to drive motors. Battery-electric buses use high-capacity (LFP) batteries for zero-emission operation; BYD's eBus B12 model, for example, incorporates up to 500 kWh of battery capacity, achieving a range of 600 km on a single charge suitable for full-day urban service. Hydrogen fuel cell buses generate onboard via (PEM) stacks that combine hydrogen with oxygen, producing only water as exhaust; has piloted these in the , including plans to deploy over 100 for the Tokyo 2020 Olympics (held in 2021), though the actual number used was reduced due to the , demonstrating ranges exceeding 500 km with refueling times under 10 minutes. Hybrid systems integrate diesel engines with electric components to enhance urban efficiency, capturing energy during braking and optimizing power delivery in stop-and-go traffic. In series configurations, the diesel engine powers a generator to charge batteries and drive an electric motor, allowing the engine to run at peak efficiency without direct mechanical linkage to the wheels, yielding up to 52% fuel savings over conventional diesels in city cycles. Parallel hybrids enable both the engine and motor to independently or jointly propel the vehicle through a shared transmission, providing flexibility for varied speeds and regenerative braking benefits; examples include New Flyer's Xcelsior series, which achieve 15–18% better fuel economy than pure diesel counterparts in transit applications. These setups reduce emissions by 50% for NOx and 90% for particulates compared to non-hybrids, supporting regulatory compliance in dense urban environments.

Accessibility and Safety Features

Modern buses incorporate various accessibility features to ensure equitable use for passengers with disabilities, primarily guided by regulations such as the Americans with Disabilities Act (ADA) of 1990 in the United States. Low-floor bus designs, which eliminate or minimize steps at the entrance, facilitate easier boarding for individuals using wheelchairs or mobility aids by reducing the entry height to approximately 9-12 inches from the ground. These designs often integrate kneeling suspension systems, where hydraulic or air mechanisms lower the front of the bus by several inches upon stopping, further bridging the gap between the vehicle and the curb or platform. Wheelchair ramps or lifts are mandated on accessible buses under ADA guidelines, with ramps at least 30 inches long required to support a minimum load of 600 pounds and provide a slip-resistant surface with handrails for stability. These features enable secure deployment for inboard or outboard-facing wheelchair users, ensuring a clear floor space of at least 30 by 48 inches for maneuvering once aboard. Additionally, audio and visual aids promote effective communication; public address systems deliver stop announcements for visually impaired passengers, while LED destination signs and tactile route maps assist those with hearing impairments or low vision, aligning with ADA requirements for auxiliary aids and services. Safety features in contemporary buses focus on preventing accidents and enhancing vehicle control, with regulations setting key standards since the mid-2010s. Anti-lock braking systems (ABS) became mandatory for new buses in the under UNECE Regulation No. 13, effective from 1997 for category M3 vehicles (buses over 5 tons), to prevent lockup during emergency stops and maintain responsiveness on varied surfaces. (ESC) systems, required for new buses from November 2015 under EU type-approval requirements implementing UNECE standards, use sensors to detect skidding and automatically apply brakes to individual wheels, reducing rollover risk by up to 50% in heavy vehicles. Collision avoidance technologies, such as advanced emergency braking systems (AEBS), have been compulsory on new buses since November 2015 under EU type-approval requirements implementing UNECE standards, employing radar and cameras to detect obstacles and initiate braking if the driver fails to respond, thereby mitigating rear-end collisions. Following the , bus designs have seen enhancements in air quality and evacuation capabilities to address health and emergency risks. High-efficiency particulate air () filtration systems, capable of capturing 99.97% of particles 0.3 microns in size, have been increasingly retrofitted or integrated into bus HVAC systems post-2020 to reduce airborne viral transmission, as recommended by the U.S. Centers for Disease Control and Prevention for public transit vehicles. These filters, often combined with increased intake, achieve air change rates sufficient to dilute viral loads in enclosed spaces. improvements include stronger latches and anti-ejection glazing on windows, mandated by the U.S. National Administration's updates to FMVSS No. 217 in 2024, to prevent partial ejections during rollovers and ensure quicker, safer evacuations.

Types and Configurations

By Propulsion

Buses are classified by propulsion based on their primary power source, which influences , environmental impact, and suitability for various routes and regulations. Traditional internal combustion engines dominate in many regions due to established , while and alternative fuels are gaining traction for emission reductions and urban goals. Diesel-powered buses provide high , making them suitable for hilly or demanding routes where heavy loads require robust without excessive strain on the . However, their higher emissions of particulate matter and nitrogen oxides have led to regulatory phase-outs; for instance, the has set 2030 as the earliest date to end sales of new non-zero-emission buses, including diesel models, aligning with London's (ULEZ) expansion. Electric and hybrid buses offer zero-emission operation at the tailpipe, significantly reducing urban and compared to diesel counterparts, with hybrids combining batteries and engines for extended range. The global market, encompassing battery-electric and hybrid variants, is projected to reach USD 23.80 billion in 2025, driven by government incentives and investments. Alternative fuels like (CNG) enable reduced emissions in developing countries where low-sulfur diesel is scarce, providing a practical transition with 12-17% lower CO2 and 12-40% lower outputs relative to conventional fuels, along with negligible emissions due to the sulfur-free nature of CNG. blends, such as B20 (20% ), further decrease hydrocarbon, , and particulate matter emissions by 3-17% in bus fleets, leveraging the fuel's oxygen content for cleaner , though they may slightly elevate in some conditions. Hydrogen fuel cell buses represent another zero-emission alternative, using fuel cells to generate electricity from hydrogen and oxygen, producing only water vapor. As of 2025, they are increasingly deployed in cities like London and Beijing for long-range routes without frequent recharging needs.

By Capacity and Layout

Buses are classified by capacity and layout to optimize passenger accommodation and operational efficiency, with designs tailored to varying demands such as urban congestion, where high-density configurations prevail, versus rural or suburban routes favoring maneuverability. Single-deck buses, the most common layout, typically seat 30 to 50 passengers and excel in city environments due to their compact size, which allows agile navigation through narrow streets and frequent stops. This flexibility makes them suitable for mixed-use routes with moderate volumes, often accommodating up to 60-80 total passengers including standees in peak conditions. Double-decker buses employ a two-level seating to boost capacity to 60-90 passengers, primarily through seated accommodations, enabling efficient transport in vertically constrained urban spaces without expanding footprint. These vehicles are particularly iconic on high-density routes in the , where they form a staple of public transit in cities like , and in , where they handle intense commuter flows across hilly terrain. Their elevated upper deck also supports sightseeing applications, though the layout prioritizes standing room during rush hours to reach total capacities of up to 120. For even greater volumes, articulated buses feature a pivoting joint linking two body sections, providing over 100 passengers' capacity—often 150-200 including standees—and are integral to bus rapid transit (BRT) systems on dedicated corridors. Bi-articulated buses extend this design with an additional jointed section, achieving 200+ capacity, as seen in Bogotá's TransMilenio BRT, where 27-meter vehicles carry up to 260 passengers (69 seated, 191 standing) to manage peak demands exceeding 40,000 per hour per direction. These layouts demand robust infrastructure like wide lanes but significantly enhance throughput in densely populated urban networks compared to rigid-body alternatives.

Specialized Variants

Specialized variants of buses are designed for specific operational needs that extend beyond conventional urban or intercity passenger transport, incorporating unique structural, safety, and amenity features tailored to their environments. These adaptations prioritize functionality for targeted applications, such as student safety, tourism enhancement, or protection in high-risk areas. School buses in the United States are distinctly engineered for the safe transport of children, featuring a standardized yellow paint scheme—National School Bus Glossy Yellow—for enhanced visibility and recognition on roads. This color, recommended by the National Highway Traffic Safety Administration (NHTSA) for conspicuity, ensures high visibility during operation, reducing collision risks by making the vehicle immediately identifiable to other drivers. Additionally, these buses employ compartmentalization seating as a primary safety mechanism, where high-backed, closely spaced seats with energy-absorbing materials cushion passengers during crashes without relying on individual seat belts for larger models. This design, mandated by Federal Motor Vehicle Safety Standard (FMVSS) No. 222, contains and protects occupants by distributing impact forces across the seating structure, proven effective in withstanding frontal and side collisions up to specified deceleration limits. School buses also include reinforced construction, such as higher floors and multiple emergency exits, to meet stringent crash protection standards set by the NHTSA. Tour buses, optimized for sightseeing and group excursions, emphasize passenger comfort and immersive viewing experiences through architectural modifications like panoramic windows that span the vehicle's sides and roof. These large, curved glass panels, often frameless or with minimal obstructions, provide unobstructed 360-degree vistas, allowing tourists to appreciate landscapes without distortion, as seen in modern motorcoach designs from manufacturers like Prevost. Onboard amenities further distinguish tour buses, including reclining leather seats, climate control, and connectivity options such as and power outlets, which support extended travel durations typical of multi-day tours. The American Bus Association highlights these features as standard in luxury tour coaches, enabling operators to offer enhanced entertainment via onboard audio-video systems and restrooms for convenience during scenic routes. Such configurations typically accommodate 40-50 passengers in theater-style layouts, prioritizing legroom and accessibility over high-density seating found in standard transit buses. Armored buses represent a fortified for secure personnel transport in conflict or high-threat zones, with reinforced hulls capable of withstanding ballistic and blast impacts. The South African , produced by Land Systems OMC, exemplifies this variant as a 4x4 mine-resistant ambush-protected (MRAP) vehicle adapted for troop and VIP conveyance, featuring a V-shaped underbody to deflect explosions and composite armor rated against fire and improvised devices (IEDs). Deployed in operations across and , the Nyala carries up to 10 personnel in a compartmentalized interior with bulletproof windows and access hatches, providing mobility in urban environments where standard would be vulnerable. These buses maintain bus-like capacity for group transport while integrating military-grade protections, such as run-flat tires and (nuclear, biological, chemical) filtration systems, to ensure operational continuity in hostile areas.

Manufacturing

Production Methods

Bus production primarily relies on assembly line techniques to ensure efficiency and consistency in manufacturing large-scale vehicles. The process typically begins with the welding of the chassis frame, often divided into sub-assemblies such as front, middle, and rear sections, which are then joined using automated or manual welding stations to form a robust structural base. Following chassis fabrication, body panels are installed through a sequence of riveting, bolting, or adhesive bonding, allowing for the integration of sidewalls, roof, and floor components onto the frame. Modular construction methods further enhance customization by enabling the prefabrication of standardized body modules—such as seating units or electrical systems—that can be assembled and reconfigured based on specific vehicle requirements, reducing lead times and material waste. Automation has become increasingly prevalent in bus production since the , particularly in and operations, to improve precision, speed, and worker . Robotic cells are employed for bus body frames, utilizing approaches to handle complex geometries and ensure uniform welds, as demonstrated in implementations that integrate and multi-axis manipulators. Similarly, robotic systems apply protective coatings to and body exteriors, minimizing overspray and achieving consistent finishes through programmed paths and vision , a practice widely adopted in automotive facilities. These trends reflect broader industry shifts toward , including collaborative robots (cobots) for hybrid human-machine workflows in assembly tasks. Post-assembly, rigorous testing protocols verify structural integrity and compliance with international standards. Crash simulations, often conducted virtually or via physical barrier tests, assess occupant protection and energy absorption using anthropomorphic dummies to measure forces and accelerations, aligning with guidelines from ISO/TC 22/SC 36 for safety and impact testing. Emissions checks involve testing of propulsion systems against cycles defined in ISO 8178, which specify procedures for measuring exhaust pollutants from compression-ignition engines under steady-state and transient conditions to ensure environmental compliance. These protocols, applied in facilities of major manufacturers, culminate in final before vehicles enter service.

Key Manufacturers

Yutong Bus, based in , is a dominant force in the global bus industry, particularly in electric vehicles, holding approximately 10% of the overall global in 2025 while commanding 30% of the domestic Chinese market. As the world's top seller of electric buses and coaches, reported strong growth in new-energy vehicle sales, with 3,381 units sold in the first nine months of 2025, capturing 51.6% of China's new-energy coach segment. The company has expanded internationally; in the first nine months of 2025, exported 10,742 buses, marking an 18.2% increase year-over-year. BYD, another Chinese giant, leads in electric bus exports and innovation, securing 31.53% of China's new-energy bus export market in the first quarter of 2025 with 945 units shipped. By mid-2025, BYD had produced its 1,000th in , underscoring its European manufacturing push, and registered 279 units in during the first half of the year, reflecting a 426% growth. Globally, BYD's bus sales surged 128.5% year-over-year in July 2025 alone, reaching 610 units, contributing to its position as a key player in the electric bus transition. Daimler Buses, operating under the brand, specializes in premium and luxury coaches, achieving an adjusted return on sales of 10.0% in the second quarter of 2025 amid strong profitability. The division registered 918 es in in 2024, earning an 11.8% share of the electric bus market and growing 105.8% year-over-year, with continued momentum into 2025 through advanced electric and hybrid models. In regional markets, Prevost holds a leading position in , particularly in the seated coach and segments, as the unequaled provider of high-end vehicles with coast-to-coast service coverage. European dominance is exemplified by , a major contributor to the continent's bus deliveries, accounting for 3.2% of registrations in the first half of 2025 with 172 units. In , Industries leads the market, with significant deliveries of electric models contributing to over 1,000 zero-emission buses in operation by mid-2025. In Asia, commands the Indian market for medium and heavy commercial vehicles, leading in the bus market with about 39% share, and the bus segment sales up 33% year-over-year in October 2025, while securing large orders like 1,937 units from state transport. In , is a prominent manufacturer specializing in low-emission and electric buses, with strong presence in urban transit fleets. The bus manufacturing sector has undergone significant consolidation, notably through Group's $3.7 billion acquisition of Navistar International in 2021, which integrated into its portfolio alongside brands like MAN and , boosting global scale and technological synergies.

Operational Uses

Public Transportation

Buses serve as a fundamental element of public transportation, delivering scheduled services on fixed routes with established timetables and tiered structures to facilitate mass mobility in urban and suburban areas. These systems integrate with rail, subway, and pedestrian infrastructure to form comprehensive transit networks, enabling seamless transfers and reducing reliance on private vehicles. In densely populated cities, buses handle high volumes of commuters, providing equitable access to , , and services for diverse populations, including those without access to automobiles. A prominent example is the Transit bus network, which operates approximately 5,800 buses on 238 local routes, 20 routes, and 75 express routes, accommodating about 1.3 million daily passengers as of 2024. This scale underscores buses' capacity to support urban economies, with services running 24/7 in key corridors to meet peak and off-peak demands. Bus Rapid Transit (BRT) represents an advanced application of buses in public transit, featuring dedicated roadways, off-board fare collection, and specialized stations to achieve rail-like performance at lower . BRT systems enhance reliability by minimizing delays from mixed , often incorporating priority at intersections and high-frequency operations. Globally, BRT has expanded to nearly 190 cities, serving more than 30 million passengers daily and integrating with multimodal hubs for broader connectivity. In , the Metrobüs BRT spans 52 kilometers across the Bosphorus, utilizing articulated buses on exclusive lanes to transport over 800,000 passengers per day while reducing in-vehicle travel times by approximately 50 percent relative to traditional buses. Such implementations demonstrate BRT's role in decongesting roadways and promoting sustainable urban growth, with typical standard and articulated buses adapted for high-capacity corridors. Public bus operations are sustained through diverse funding mechanisms, including direct subsidies, public-private partnerships (PPPs), and passenger fares, which collectively address capital and operational expenses. Subsidies from local, state, and federal sources cover infrastructure maintenance and expansions, while PPPs enable private investment in projects like BRT development by allocating design, financing, and operational responsibilities. Fare revenues, measured by the farebox recovery rate, typically recover 20 to 30 percent of costs in U.S. bus systems based on pre-pandemic averages (2015-2019), necessitating ongoing public support to maintain affordability and service quality. This funding mix ensures resilience against economic fluctuations, prioritizing accessibility over full cost recovery.

Private and Charter Services

Private and charter bus services encompass the rental and operation of buses for non-scheduled, client-specific transportation, prioritizing customization, direct routing, and premium amenities to meet diverse group needs such as , corporate , and specialized shuttles. Unlike fixed-route systems, these operations function on a for-hire basis, allowing operators to tailor services to exact requirements, including timing, destinations, and onboard features, which enhances efficiency for private clients. Charter buses form the core of this sector, rented by groups for one-off or recurring trips like conferences, weddings, sports events, and tours, where flexibility in scheduling and vehicle selection is paramount. These motorcoaches typically accommodate 40 to 60 passengers and include luxury elements such as reclining seats with adjustable headrests and footrests, onboard restrooms, climate control, connectivity, and entertainment systems to ensure comfort during extended journeys. , the scheduled and bus services industry, encompassing motorcoach charters, reached a market size of $7.1 billion in 2025, driven by demand from recovery and event hosting. Corporate employee shuttles represent a growing subset of private services, with companies deploying dedicated bus fleets to facilitate workforce mobility across campuses, remote sites, and urban transit connections, often integrating with broader goals by reducing solo car commutes. A prominent example is Google's shuttle program in , which serves around 1,200 employees daily via a fleet of 32 buses, providing seamless from regional hubs to office locations and supporting through reliable, eco-friendly options. Ride-sharing integrations have further diversified private bus operations by enabling on-demand services through mobile applications, blending the scalability of ride-hailing with higher-capacity vehicles for dynamic group travel. Platforms like offer software-as-a-service and operational support for these shared rides, partnering with transit agencies and private entities to optimize routes in real-time. Post-2020, Via's services experienced robust expansion, with revenue growing 35% to $337.6 million in 2024 and achieving a of 50% from a 2021 baseline of approximately $100 million, fueled by urban demand for flexible, app-accessible transport. This model emphasizes algorithmic matching of riders to minibuses, promoting cost-efficiency and environmental benefits over traditional charters.

Niche Applications

In the United States, dedicated buses serve as a primary means of , designed specifically for with features like mechanical stop arms that extend outward and alternating red flashing lights to alert other drivers when students are boarding or exiting. These mechanisms are standard on school buses nationwide, and federal guidelines from the (NHTSA) emphasize their role in preventing accidents, with all 50 states enacting laws that require motorists to stop for a school bus displaying these signals, regardless of direction of travel on undivided roads. School bus transportation is mandated for eligible students—typically those living beyond a specified from —in most states, where must provide service to ensure access to , often prioritizing yellow-painted, purpose-built vehicles for visibility and compartmentalization . Beyond passenger services, bus chassis configurations enable niche applications in goods transport, particularly through cutaway models where the cab integrates seamlessly with a custom cargo body for efficient loading and unloading. These vehicles, built on medium-duty from manufacturers like Ford, support delivery operations by accommodating shelving, partitions, and rear doors tailored for parcels, with examples including the Ford Transit Cutaway used by logistics firms for urban and rural routes. Postal services also utilize similar cargo vans; for instance, the (USPS) incorporates Ford E-Transit variants in its fleet for , with high capacities up to 4,500 pounds. Promotional applications transform buses into platforms, often through full or partial vinyl wraps that display brand messaging to capture high-visibility impressions in urban environments and at events. Companies wrap tour buses or shuttles to promote products, with campaigns achieving 30,000 to 80,000 daily views per vehicle due to their mobility across high-traffic areas. A notable example is Warby Parker's 2012 "Class Trip" initiative, which retrofitted a with branded interiors for pop-up fittings at music festivals and college campuses, enhancing consumer engagement through experiential marketing.

Global Perspectives

Regional Adaptations

In , bus designs emphasize high-capacity configurations to accommodate dense urban populations and challenging terrains. extensively utilizes double-decker buses for commuter transport, with models like the B8L offering up to 141 passengers per vehicle to maximize efficiency on congested routes. Recent advancements include the deployment of 35 electric double-decker buses in 2025, each 12 meters long with a 472 kWh battery capacity, supporting the city's push toward sustainable high-volume transit. In , electric bus adoption has surged due to government policies promoting clean energy, resulting in over 554,000 new energy buses comprising 81.2% of the national fleet by late 2024, with ongoing expansions projected to sustain this leadership in electrified . In , particularly , minibuses known as matatus dominate informal networks, serving as affordable, flexible options in rapidly growing cities like where they handle nearly 70% of transit trips. These 14-seater vans are typically privately owned and operated by individual drivers or small-scale entrepreneurs, often navigating unregulated or semi-regulated environments despite requirements for affiliation with Savings and Credit Cooperative Organizations (SACCOs) for oversight. This model reflects cultural preferences for vibrant, community-driven mobility but poses challenges in safety and maintenance due to limited formal regulation. Latin American bus operations frequently incorporate (BRT) systems tailored to urban density and environmental conditions, with 's Metrobús standing out as the region's longest network, spanning over 140 kilometers across seven lines and serving 1.8 million daily passengers since its inception in 2005. In tropical climates prevalent in parts of , such as coastal areas in and , buses feature enhanced systems to combat high heat and humidity, including optimized cooling capacities that address elevated passenger loads and ambient temperatures exceeding 35°C. These adaptations, informed by engineering improvements for hot environments, improve and ridership reliability in humid conditions.

International Standards and Events

International standards for bus emissions aim to reduce environmental impact through harmonized regulations across major markets. In the , Euro 7 (Euro VII) standards, established under Regulation (EU) 2024/1257, apply to heavy-duty vehicles including buses (categories M2, M3, N2, N3). These standards mandate stricter limits on pollutants such as (0.20 g/kWh), PM (0.008 g/kWh), and non-tailpipe emissions from brakes and tires, with implementation for new type approvals starting May 29, 2028, and for all new vehicles from May 29, 2029. In contrast, the Agency's (EPA) Phase 3 greenhouse gas standards, finalized in 2024, target heavy-duty vehicles like transit and school buses starting with 2027, requiring up to 60% CO2 reductions for vocational vehicles through improved efficiency and zero-emission technologies, while maintaining flexibility for averaging, banking, and trading of credits. These differing timelines and focuses—Euro 7's emphasis on real-driving emissions (RDE) testing versus EPA's CO2-centric approach—facilitate cleaner engines but require manufacturers to adapt designs for transatlantic compliance. Safety certifications for buses are primarily governed by Economic Commission for Europe (UNECE) regulations under the World Forum for Harmonization of Vehicle Regulations (WP.29), promoting global uniformity in . Key standards include UN Regulation No. 66, which specifies requirements for the strength of bus superstructures (M3 category) to withstand rollover impacts, and UN Regulation No. 29 for cab strength, extended to buses in some applications to protect drivers during frontal collisions. These regulations, part of the 1958 Agreement, have been adopted by 54 contracting parties, including the , , and , with many other countries incorporating them into national laws, ensuring enhanced occupant protection through deformation resistance and intrusion prevention in crashes. Compliance involves rigorous testing, such as the dome impact test for roof integrity, fostering safer bus designs worldwide. Industry events play a crucial role in advancing bus standards through exhibitions and policy forums. Busworld Europe, held biennially in , is the premier global B2B event for buses and coaches; its 2025 edition (October 4–9) featured 559 exhibitors from 40 countries, including 81 bus manufacturers showcasing over 200 models, with a strong emphasis on electric and low-emission prototypes aligned with Euro 7 and similar standards. Complementing this, the International Association of Public Transport (UITP) organizes summits and congresses for policy discourse; the 2025 UITP Global Public Transport Summit in (June 15–18) gathered over 400 exhibitors and leaders to discuss regulatory frameworks, policies, and innovations like zero-emission buses, influencing global adoption of emissions and safety norms. These gatherings facilitate knowledge exchange, standard harmonization, and collaboration among stakeholders to address uniform challenges in bus deployment.

Sustainability and Innovations

Environmental Considerations

Buses, particularly those powered by diesel engines, contribute significantly to urban air pollution and during operation. A typical diesel bus emits approximately 800 grams of CO2 per kilometer traveled, based on average fleet data from the , which accounts for fuel combustion and excludes passenger load variations. This figure underscores the environmental burden of conventional bus fleets, where tailpipe emissions include not only CO2 but also particulate matter and nitrogen oxides, exacerbating local air quality issues in densely populated areas. Electric buses offer a stark contrast with zero tailpipe CO2 emissions, eliminating direct combustion-related pollutants at the point of use. However, a full —encompassing battery production, vehicle manufacturing, and —reveals emissions ranging from 200 to 400 grams of CO2 equivalent per kilometer, heavily influenced by the grid's carbon intensity; cleaner renewable sources yield lower values, while fossil-fuel-dominant grids approach the higher end. These reductions, often 50-70% compared to diesel equivalents over the vehicle's lifespan, highlight the potential for to mitigate the sector's when paired with decarbonized energy infrastructure. As of 2025, electric buses represent a growing share, with over 1 million units in global fleets, primarily in and , accelerating emission reductions. To address these impacts, sustainability initiatives like the European Union's Green Deal have established binding targets for bus fleets. The amended CO2 standards for heavy-duty vehicles mandate that 90% of newly registered urban buses must be zero-emission by 2030, accelerating the transition away from fossil fuels and aligning with broader goals to cut transport emissions by at least 90% by 2050 relative to 1990 levels. Beyond operational emissions, the lifecycle environmental footprint extends to end-of-life management, where retired buses generate from metals, plastics, and composites. Under the EU's End-of-Life Vehicles Regulation, vehicles—including buses—must achieve at least 85% reusability and recyclability by average weight, with current EU-wide rates reaching 89.1% in 2022 through processes like dismantling and material recovery. Efforts to recycle composites from retired vehicles target improved rates to minimize use and promote principles, though challenges persist due to material complexity.

Technological Advancements

Technological advancements in bus systems are increasingly focusing on , , and integrated connectivity to enhance efficiency, , and . Autonomous buses represent a pivotal shift, with Level 4 trials demonstrating high in controlled environments. In , the (LTA) awarded a in 2025 to a including BYD and MKX Technologies for a three-year pilot deploying six 16-passenger autonomous buses on public routes 191 () and 400 ( Bay), starting with testing in mid-2026 and progressing to unsupervised operations. Earlier trials, such as those involving Navya pods in since 2016, laid groundwork for these developments, but the 2025 initiative marks a step toward full integration into public fleets. In the United States, the launched the nation's first public autonomous transit shuttle service (NAVI) in June 2025, operating a fleet of 14 electric vehicles along a 3.5-mile route to assess long-term feasibility for driverless operations in urban settings. Industry projections indicate that driverless buses could become viable for scheduled services by 2030, driven by advancements in sensors, AI, and regulatory frameworks. Artificial intelligence integrations, particularly through (IoT) sensors, are enabling to preempt failures and optimize fleet operations. , a major transit operator, employs AI platforms like Stratio to monitor vehicle data in real-time, allowing for proactive interventions that minimize breakdowns and extend component lifespans. While specific 2025 reports from highlight improved scheduling and cost reductions, broader industry studies show via IoT can reduce unplanned downtime by up to 45% and maintenance costs by 30%. These systems analyze patterns in engine performance, tire wear, and electrical components, scheduling repairs during off-peak hours to maintain service reliability. Such technologies not only lower operational expenses but also contribute to environmental benefits by optimizing energy use in electric and hybrid buses. Multimodal connectivity advancements are fostering seamless integration between buses, trains, bikes, and other transport modes through mobile apps, enhancing in smart cities. App-based platforms enable real-time planning, ticketing, and mode-switching, with features like unified payments across services. In integrated systems, such connectivity has boosted ridership by approximately 14-16% in urban areas adopting digital fare and route optimization tools. For instance, hubs combining with bike-sharing and rail links have shown increased usage by improving first- and last-mile solutions, as evidenced in studies of connected transit networks. These innovations support broader sustainability goals by encouraging public over private vehicle use.

Legacy and Repurposing

Preservation Initiatives

Preservation initiatives for historical buses focus on safeguarding these vehicles as cultural and technological artifacts, ensuring their stories and engineering legacies endure for educational and public appreciation. Organizations worldwide lead these efforts through archiving, restoration, and public engagement, emphasizing authenticity and historical accuracy. For example, in Australia, the Sydney Bus Museum, established in 1966, preserves over 100 historic vehicles dedicated to New South Wales transport history. In the , the Omnibus Society, established in the mid-20th century, plays a central role in bus preservation by studying the history and development of road passenger transport, maintaining extensive archives of timetables, photographs, and materials to support research and conservation projects. Complementing this, the London Bus Museum, which traces its roots to early private preservation attempts in the , houses one of the largest collections of working historic London buses and conducts detailed restorations to original specifications. In the United States, the Museum of Bus Transportation, part of the AACA Museum and operational since , curates a national showcase of historic buses, including over a dozen vintage examples on display, preserving the industry's heritage through displays and educational exhibits that highlight innovations from the early onward. These collections underscore buses' contributions to American mobility and , with efforts centered on maintaining operational vehicles for demonstrations. Restoration techniques for early models, such as those from the , demand meticulous sourcing of parts, often from salvaged originals, donor vehicles, or custom fabrications to replicate obsolete components like and engines. For instance, the restoration of London's B-type buses—iconic double-deckers produced from to —involved assembling decayed original bodies, gearboxes, and engines to achieve historical fidelity while addressing and wear. These processes, typically undertaken by specialized workshops, prioritize non-invasive methods to retain and , extending the lifespan of vehicles like the 1929 AEC T31 single-decker preserved at the London Bus Museum. Public events further advance preservation by fostering community involvement and showcasing restored buses. Bus Museum's annual Spring Gathering, held since 1974, draws enthusiasts to view operational historic vehicles, exchange restoration knowledge, and celebrate London's transport evolution through rides and displays. Contemporary efforts incorporate to complement physical conservation, utilizing to create detailed virtual models of rare vehicles for archival purposes, analysis, and potential part replication without risking originals. This technology enables global access to high-fidelity digital twins, supporting long-term safeguarding against deterioration.

Retired Bus Applications

Retired buses, once decommissioned from primary transit duties, find new purposes through creative repurposing that extends their utility while addressing diverse societal needs. These applications transform vehicles originally designed for mass passenger transport into specialized units for commerce, housing, emergency response, and alternative mobility solutions. Such conversions not only reduce waste but also provide cost-effective alternatives in resource-limited contexts. One common reuse involves converting retired buses into , leveraging their spacious interiors and mobility for businesses. For instance, in 2019, Denton Independent School District in repurposed an old into the "Bus Stop Bistro," a high-end serving students and staff with features like counters and commercial appliances. Similarly, a 2015 conversion of a small Swedish into a vibrant red for the Felix demonstrated how retired vehicles can support promotions and vending, with modifications including installations and exterior branding. These projects highlight the economic viability of bus conversions, often costing less than building new while retaining the vehicle's inherent durability. Retired buses are also adapted into mobile homes, offering affordable, nomadic living options for individuals and families. Modern examples include a double-decker bus transformed into a fully equipped home on wheels in 2025, featuring solar panels, a , and sleeping quarters for two, as showcased by owners Ted and Kim for off-grid adventures. Other conversions, such as those documented in collections of tiny home projects, involve gutting school buses to install plumbing, electrical systems, and insulation, creating livable spaces under 400 square feet that promote sustainable, minimalist lifestyles. These adaptations appeal to van-life enthusiasts and those seeking low-cost housing amid rising real estate prices, with buses' robust frames providing better weather resistance than traditional RVs. In disaster relief, decommissioned buses serve as immediate response units, providing evacuation, shelter, or medical support in crises. A notable example from 2005 occurred during , when 20-year-old Jabbar Gibson commandeered an abandoned in New Orleans to over 70 stranded residents, driving them 350 miles to safety in despite lacking a commercial license. This ad-hoc repurposing underscored the potential of idle vehicles for emergency transport, inspiring later formal initiatives like San Francisco's 2017 conversion of old Muni buses into mobile ambulances equipped with stretchers and medical kits for mass casualty events. Such units enable rapid deployment to affected areas, offering temporary housing or aid distribution without the need for new . Rail modifications represent an innovative reuse, particularly in regions with underutilized rail networks, where buses are fitted with flanged wheels to create hybrid vehicles for rural lines. In Peru during the 1970s, experiments with bus-on-rail systems emerged to serve remote Andean routes, culminating in the Huancayo-Huancavelica railway's use of ferrobuses—retired bus mounted on rail bogies—for efficient passenger service over challenging terrain. These hybrids combined bus affordability with rail stability, allowing operation on tracks where full trains were uneconomical, and extended vehicle life by repurposing bodies for a secondary rail role. Finally, exporting refurbished retired buses to developing regions sustains global transport needs while prolonging vehicle lifespans. exports significant numbers of used vehicles, including buses, primarily to , where 20-year-old models from fleets like those in the UK or are overhauled with engine rebuilds and safety upgrades before redeployment. According to the International Union of , these secondhand buses often extend their operational life by 5 to 10 years in African services, supporting urban and rural mobility in countries like and amid limited budgets for new acquisitions. This practice, while beneficial for access, has prompted international efforts to ensure exported vehicles meet minimum safety and emissions standards to mitigate environmental and road safety risks.

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