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Comeng
Alstom-refurbished Comeng 571M on a Werribee-bound service near Westona Station, November 2023
Interior of an Alstom-refurbished Comeng with life extension upgrades
Stock typeElectric Multiple Unit
In service28 September 1981 – present
ManufacturerCommonwealth Engineering
Built atDandenong, Victoria
Replaced
Constructed1981–1988
Refurbished
Scrapped2021–present
Number built570 carriages (190 sets)
Number in service333 carriages (111 sets)
Number scrapped226 carriages
Successor
Formation3-car sets (M–T–M)
Fleet numbers
  • 301M–468M, 471M–554M, 561M–680M, 691M–698M
  • 1001T–1084T, 1086T–1127T, 1131T–1190T, 1196T–1199T
Capacity210 seated, 765 crush load per 3-car unit
OperatorsMetro Trains Melbourne (2009–present)
Previous:
DepotsCalder Park
Craigieburn
Kananook
Newport
Lines served
Specifications
Car body constructionStainless steel
Train length71.2 m (233 ft 7+18 in)
Car length
  • 24 m (78 ft 8+78 in) (motor carriages)
  • 23.2 m (76 ft 1+38 in) (trailer carriages)
Width3.05 m (10 ft 116 in)
Height3,835 mm (12 ft 7 in)
Doors3 per side
Maximum speed115 km/h (71 mph)
Weight141 t (139 long tons; 155 short tons) (max)
Traction system
  • Resistance control (301M–468M, 471M–554M, 561M–680M)
  • Chopper control (691M–698M)
Traction motors8 × GEC G317AZ 124 kW (166 hp) (continuous) series-wound DC motor
Power output992 kW (1,330 hp) (continuous)
Acceleration0.8 m/s2 (2.6 ft/s2)
Deceleration
  • 0.85 m/s2 (2.8 ft/s2) (service)
  • 0.95 m/s2 (3.1 ft/s2) (emergency)
Electric system(s)1,500 V DC (nominal) from overhead catenary
Current collectionPantograph
UIC classificationBo′Bo′+2′2′+Bo′Bo′
Bogies
  • Bradford Kendall B.K.12390 (tread brake, motor cars)
  • Bradford Kendall B.K.12391 (tread brake, trailer cars)
  • Linke-Hofmann-Busch (disc brake)
  • Alstom (disc brake replacement)
Braking system(s)Electro-pneumatic and rheostatic
Coupling systemScharfenberg
Track gauge1,600 mm (5 ft 3 in) broad gauge
Notes/references
[1][2][3]

The Comeng (/ˈkɒmɛn/ KOM-enj) is a class of electric multiple unit (EMU) operating on the suburban railway network of Melbourne. Built by their namesake Commonwealth Engineering (abbreviated as Comeng), the trains were introduced in 1981 as a replacement for the Tait and Harris trains. In total, 190 three-car trainsets were built, although only 111 remain in service and are expected to be retired by 2030.

The fleet underwent two major refurbishments. The first, a mid-life refurbishment, was carried out from 2000 to 2003 by Alstom and EDi Rail. The second, named the Comeng Life Extension Project, completed between 2017 and 2021, aimed to extend the trains' lifespan to meet their gradual replacement by the High Capacity Metro Trains and the X'Trapolis 2.0 trains. Alongside these upgrades, a number of minor improvement programs were also conducted on the trains to further enhance their efficiency, safety, and reliability.

Description

[edit]

Comeng trains are single deck and are semi-permanently coupled as M-T-M (motor-trailer-motor) sets. Most frequently, they are coupled as M-T-M-M-T-M (six-car) sets. Comeng trains have power operated doors that must be pulled open manually by hand but are closed by the driver. The trains were the first suburban trains in Melbourne to have air-conditioning in the passenger saloon.[original research?] (The older Hitachi trains had driver only air-conditioning fitted more recently.[4])

They operate in larger numbers on the Northern, Caulfield, Cross City and Sandringham group lines. Since 2017, it has been rare to see Comengs on the Burnley and Clifton Hill group lines which are serviced almost exclusively by newer X'Trapolis trains. The design of Melbourne's Comeng trains is closely related to that of Adelaide Metro's diesel-electric 3000 class railcars.[original research?]

The Comeng fleet has begun retirement, with many sets being transferred to North Shore and Tottenham to be stored. The stored sets eventually being transferred to Laverton, North Bendigo or McIntyre for scrapping. The fleet will eventually be replaced by the High Capacity Metro Trains (HCMT) and X'Trapolis 2.0 fleet.[5]

History

[edit]
A now-scrapped unrefurbished Comeng set in its original Metropolitan Transit Authority livery

In 1979, the operator of the Melbourne rail network at the time VicRail, placed an initial order for 100 new 3-car train sets, with the intention of replacing the last of the Tait sets and the majority of the Harris sets. The contract was awarded to Commonwealth Engineering, with the trains being manufactured at Comeng's Dandenong rolling stock factory.[citation needed]

The first Comeng set, 301M-1001T-302M, entered service on 28 September 1981. By the middle of 1984, 76 sets had been delivered, and some of the older trains, including the last of the Tait rolling stock, had begun to be phased out. Following the operational problems and subsequent failed refurbishment of the Harris fleet, the initial order was increased from 100 to 190 3-car sets, with the aim of completely replacing both the Tait and Harris sets by 1988.[6]

Set 381M-1041T-382M was the first delivered in the Metropolitan Transit green and yellow scheme, though the sets including 27T and 28T had been repainted (with those cars renumbered 1027T and 1028T respectively) before then.[7] Notably, when the 41st set was delivered the front panels of the motor carriages were still silver-framed rather than yellow.[8]

The 45th set delivered had custom decals applied to the sides celebrating the halfway point through the order. On the side (above each door) was the quote "45th Super Train from The Met", and the sides also displayed the number 45 in large Numerals below the windows. This was found on two sets, 477M-1089T-478M and 479M-1090T-480M. These had been removed by 1 February 1991. 477M-1089T-478M still remains in service, but 479M-1090T-480M was stored at North Shore before being scrapped in early 2022.[9]

The final Comeng set to enter service was 697M-1199T-698M on 24 July 1989.[citation needed]

Refurbishment

[edit]
2000–2003
An M>Train liveried Comeng 477M as delivered after refurbishment by EDi Rail. The brand went defunct in 2004, leaving Connex to take over all Comeng operations.
A Connex liveried Comeng set, probably 568M-1134T-567M, as refurbished by Alstom between 2000 and 2003, arrives into Tooronga station.

Between 2000 and 2003, the two train operators at the time, Connex and M>Train, had Alstom and EDi Rail respectively refurbish the trains.[10][11]

The Alstom and EDi Rail sets have a number of differences, including:

  • Interior arrangement – The interior LED displays on the M>Train trains were in the middle, as opposed to being at both ends of the carriage on Connex sets.
  • Upholstery – Seats in M>Train trains were given a blue texture, while Connex opted for rainbow-textured seats, with scattered letters spelling out "Connex".
  • Seating arrangement – Both operators designed their carriages different seating layouts.
  • Exterior front panels – Information on the train's terminus is displayed on top of the window on M>Train fleets, while Connex trains have them displaying on the right window (in pre-refurbishment style).
  • Cab layout – The EDI Rail refurbished trains retained a second full-size seat on the right-hand side of the cab, originally used for the guard, whereas the Alstom sets only have a small seat, the same size as the passenger ones.
  • Cab fittings – The EDi Rail trains also have a windscreen-wiper on both sides, the Alstom sets only having one on the driver's side.
  • Light fittings – The Alstom refurbished trains have grated light coverings, while the EDi type retained the original flat coverings.
Former horn of an EDI refurbished Comeng, a Roy Victor Butler (RVB) 3 Chime Horn. This was replaced with the newer Zöllner Makrofon 370 in late March 2024

Both sets had CCTV and emergency assistance panels introduced and installed as part of the refurbishment program.[12]

After Connex assumed responsibility for all of Melbourne's suburban train network in 2004, the EDI refurbished trains (from M>Train) had the M>Train exterior logos removed with a new Connex logo in its place alongside a repainted front panel. The trains also later received Connex blue and yellow side stripes, new seat fabric with the Connex branding.

Concorde program

[edit]
2006–2007

From December 2006 both fleets were allowed to run system wide. The electronics of both Comeng types were altered to make them electronically compatible with each other, with both the PID voices and display formatting altered. Both types of Comeng can run system wide and can run in multiple unit with trains of the same or different type.

Interior rearrangements

[edit]
2009

From the beginning of March 2009, Connex ran a test set of carriages with new seating arrangement on city lines.[13] The new arrangements removed 44 seats, making room for more standing on the train. The changes were made to accommodate the increased patronage on the Melbourne rail network.[14]

Door upgrades

[edit]
2014–2015

Comeng trains still require passengers to manually open saloon doors to enter and exit the trains. Pneumatic air pressure keeps the doors closed whilst the trains are in motion, and is released by the driver when the carriages stop at station platforms. Prior to 2014, the doors were fitted with large "door knob" style handles. These made it relatively easy for unruly passengers to force the doors open, including while the train was in motion. All carriages were retrofitted with a new flat slim handle designed to make doors more difficult to force open. This followed an incident at Watergardens railway station where teenagers forced open a door on a moving train and one jumped out, injuring himself. Alan Osbourne, then director of Transport Safety Victoria (TSV), informed Metro that the Comeng trains would be taken out of service if their doors were not made impossible to force open by 2017.[15]

Life extension

[edit]
2017–2021
Alstom Comeng
EDI Comeng
Life extension refurbishments were carried out between 2017 and 2021

From 2017 to 2021, the entirety of the existing Comeng fleet undertook a $75 million life extension refurbishment program with a number of upgrades taking place in order to allow the fleet to operate reliably and safely for at least another decade prior to their retirement.[16][17] These upgrades were carried out in stages (1, 2 & 3), focusing on external, internal, mechanical and safety system upgrades.

Stage 1 of the life extension refurbishment works revolved only on exterior modifications, with much of the mechanical and safety systems remaining the same and their interiors largely unaltered from their 2014/2015 modifications. 25% of the existing Comeng fleet undertook only the stage 1 life extension refurbishment. The stage 1 upgrades include:

  • LED marker lights
  • New vinyl stickering with PTV branding identity livery on the exterior fibreglass front panels.
  • Removal of external handles and step ladders at the leading end of all motor cars to reduce instances of train surfing.
Interior of an unrefurbished Comeng set (pre 2000's)
Original (pre 2000's)
EDI Comeng with Connex interior after transfer from M>Train
EDI Comeng with Connex interior after transfer from M>Train
An EDI Comeng set that has received stage 2 Upgrades. Note that there are no new passenger information displays (PIDs).
EDI Comeng – Stage 2 upgrades
Stage 1 upgrades did not affect the interior of the trains as they were only external changes.

Stage 2 of the life extension refurbishment works concentrated on both interior and mechanical upgrades, with 75% of the existing Comeng fleet undertaking the stage 2 refurbishment. In addition to the stage 1 upgrades, the stage 2 upgrades include:

  • Updated upholstery – Seats in Connex rainbow-textured pattern were updated to Public Transport Victoria's corporate identity in either blue or orange (priority seating) geometric design.
  • Additional and upgraded grab handles and poles.
  • Concertina style enclosed gangways between carriages.
  • Improved saloon lighting and additional handholds.
  • Door upgrades.
  • Improvements to the driver's panel.

Stage 3 of the life extension refurbishment works focused on communications and additional mechanical upgrades, with 31% of the Comeng fleet, namely the disc brake units, having been further enhanced with these upgrades. These sets will more than likely be the last Comeng sets to remain in service when they will be eventually retired. In addition to the stage 2 upgrades, the stage 3 upgrades include:[18]

  • New external LED destination signs.
  • New dynamic Passenger Information Screens which displays real time data.[18]
  • Improved safety enhancements, including an upgrade to high definition CCTV cameras with better clarity and a wider field of view, and new emergency help points.[18]
  • Improvements to hearing aid links with a new and upgraded speaker and onboard announcement system.[18]
  • Improvements to the overall air compression system powering the brakes, doors, pantographs and traction systems.

The life extension refurbishment program was completed by the end of 2021 with 75% of the Comeng units having undergone the stages 2/3 upgrades. As of June 2023, all stage 1 sets, along with some stage 2 sets have been scrapped, having since been replaced by the High Capacity Metro Trains.

The Zollner Makrofon 370 horn on Comeng 678M
Chopper Comeng carriage 694M stored at Newport Workshops

Horn Upgrades

[edit]
2023–2024

In May 2023, 12 Comeng sets were trialled with a new Zöllner Makrofon 370 single tone horn, sounding similar to an X'Trapolis 100 horn, to replace the Roy Victor Butler (RVB) 3 chime horn. After it was deemed successful, from November 2023, the rest of the Comeng fleet started to receive the new horns, and was completed in late March 2024.[19]

Retirement

[edit]
Two P classes haul two 3 car Comeng units to North Bendigo for scrapping.
Stored Comeng Trains in Tottenham Yard
Scrapped carriages piled up at InfraBuild Recycling in Laverton North

In November 2017, none of the remaining Comeng chopper carriages including the (691M-698M) motors and (1196T-1199T) trailers were included in the new Metro contract, which saw them retired out of service. Half of these units were stored at Newport Workshops, while the other half have been supplying parts to the remaining Comeng units in service.[citation needed]

In 2018, Comeng set 313M-1007T-314M and 367M-1034T-368M were withdrawn from service and stored at Newport Workshops.[citation needed]

In 2019, it was revealed that if the X'Trapolis 2.0 was made, the Comengs could be out of service as early as 2026.[20] However, it is most likely that the final Comeng set will be withdrawn closer to 2030.[citation needed]

On 21 August 2021, retired Comeng sets 321M-1107T-320M and 363M-1032T-364M were transferred to North Shore. These sets were replaced with the High Capacity Metro Trains, starting a long process of the retirement of Comeng sets, likely to take most of the decade. As of 27 April 2022, 44 3-car Comeng sets have been retired out of 189 3-car sets in service at the formation of Metro Trains Melbourne.[citation needed]

On 9 February 2022, the first Comeng unit was scrapped since 2014. This saw the scrapping of set 338M-1092T-484M at Dandenong South. Subsequently, there have been 70 3-car Comeng sets scrapped as of 30 May 2024.[citation needed]

On 12 June 2022, the last of the Stage 1 Comengs (331M-1050T-400M & 393M-1048T-394M) were transferred to Newport Workshops to be decommissioned.[1]

All remaining Comeng sets of the earlier 'tread brake' variety are now EDI refurbishments. These are internally referred to as 'Westcode' sets, while the disc brake variety is known as 'Knorr'. As of September 2022, all Alstom refurbished sets in the Westcode group had been withdrawn. As by this date, one chopper set (693M-1197T-694M) has been scrapped.[1]

In June 2023, all Alstom tread brake Comeng sets have been scrapped, having only receiving the stage 1 life extension upgrades. 359M-1030T-360M was the final stage 1 Alstom refurbished set to be scrapped.[1] By this date, the remaining chopper sets have all been scrapped.[1]

As of 2 August 2025, this leaves only 54 Alstom refurbished disc brake sets and 57 EDI refurbished tread brake sets in revenue service. All of the Comeng trains in revenue service are most EDI stage 2 sets and almost all Alstom stage 3 sets. All of these sets retired were all Stage 1, some Stage 2 sets and four Stage 3 sets.[1]

Knorr Comeng in ECOM (yellow & black) livery.
Comeng 633M-634M at Newport Station with EV120 after being converted for use on infrastructure evaluation carriages.

On 7 May 2025, 633M-1167T-634M and 585M-1143T-586M were withdrawn from service, and 1167T and 1143T were scrapped, while the motor carriages, 633M-634M and 585M-586M were converted as two car sets and were retained for use on infrastructure evaluation trains on the suburban network. The two motor carriages on 633M-634M and 585M-586M are both expected to remain in some form of service far longer than other members of the class.[1]

Alstom Comeng (614M) passing through Ringwood during an X'Trapolis 2.0 (Set 3) transfer to Upper Ferntree Gully.

Stored carriages

[edit]
Car 368M stored at Newport Workshops awaiting scrapping

70 Comeng carriages have been scrapped or removed from service.[1]

Eight carriages have been scrapped prior to the major withdrawals (from 2021 onwards): 315M, 388M, 1165T, 1109T, 533M, 305M, 1003T and 306M. 315M was burnt out at Hurstbridge on 9 April 1983, along with Tait 472M,[21] 388M was hit by V/Line locomotive N457 at Officer, 1165T was burnt out at Northcote, 1109T was damaged in a collision with Comeng 634M at Epping,[22] while 533M was burnt out by vandals at Merlynston in April 2002.[1] Both 1109T and 533M were stored at the Ballarat Workshops and were scrapped in August 2010.[23] In November 2012, 305M-1003T-306M crashed into a truck at Abbotts Road in Dandenong South. These cars were stored in Dandenong South near the crash site, visible from the Cranbourne Line until May 2014, when they were scrapped.

Following the Dandenong South collision, set 583M-1022T-589M was withdrawn and stored at Newport Workshops. This set was trailing 305M-1003T-306M but received significantly less damage. It never re-entered service and was later scrapped during the major withdrawals, being the first disc brake series set to be scrapped.

Another four carriages have been stored: 500M, 671M, 672M, and 1186T. 500M was burnt out at Sandringham in 2002[24] and can be seen in a yard close to the North Williamstown station side of the Newport railway workshops. 671M was partly burnt out at Gowrie in 1994. Spare cars 672M and 1186T, which were made redundant after 671M was burnt, underwent a prototype refurbishment before being stored. 671M is currently in use by Fire Rescue Victoria for firefighter training.

On 25 February 2019, EDI Comeng 333M collided with a buffer stop at the end of a stabling siding at Newport. The train was withdrawn from service and previously stored EDI Comeng 314M was modified to run with 1017T and 334M. 333M was coupled with existing retired cars 313M and 1007T, and was stripped of useable parts in preparation for scrapping.

[edit]
  • An Alstom refurbished Comeng in Connex colours can be seen in the background of a carriage scene on the TV series How I Met Your Mother, Season 9, Episode 1 (set in New York).[25]
  • 2 withdrawn Alstom refurbished Comengs can be seen in the background of the Australian TV series, Superwog, Season 1, Episode 6, "The Zombie Apocalypse", which was filmed at Newport Workshops.[26]

2003 Broadmeadows Runaway

[edit]

In February 2003, Comeng Set 393M, 1048T and 394M ran away from broadmeadows and collided with a V/Line N class locomotive going to Bacchus Marsh, No one was killed but, 16 were injured.[citation needed]

References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
The Comeng is a class of (EMU) trains built by Commonwealth Engineering in Dandenong, , between 1981 and 1989 for the suburban railway network of , Victoria. Comprising 190 three-car sets (M-T-M configuration) totaling approximately 570 carriages, these stainless-steel, single-deck trains were the first in Melbourne's suburban fleet to feature full and were designed to replace older wooden and Harris . Powered by 1500 V DC overhead with a maximum speed of 115 km/h, they include variants with tread brakes (sets 301–554), disc brakes (sets 561–698), and a small subset (691–698) equipped with experimental chopper control systems. Introduced by the (later VicRail), the Comeng fleet played a pivotal role in modernizing Melbourne's rail system, with initial deliveries focusing on high-capacity 6-car formations for peak services and 3-car sets for off-peak operations until around , after which 6-car sets became standard except for specific shuttle routes. Over their service life, the trains have operated under multiple operators, including The Met, Connex, M>Train, and currently , which manages the network under a public-private . Notable features include a capacity of up to 278 seated per 3-car set post-refurbishment, dimensions of 71.2 m for a 3-car unit (extending to 142.4 m for 6-car), and a width of 3.05 m, with early liveries evolving from VicRail's "Teacup" scheme to the modern (PTV) blue-and-white design. Refurbishments began in the early 2000s, with handling 54 sets and EDI Rail completing 57 more by 2003, incorporating cosmetic updates such as LED tail lights, event recorders in place of guards' periscopes, and enhanced interiors for improved comfort and safety. Ongoing upgrades, supported by a $75 million investment, have included real-time passenger information displays, high-definition CCTV, enhanced audio announcements, and improvements to braking, door, and traction systems, ensuring the fleet's reliability as the "workhorses" of Melbourne's network despite their age—the first units entering service in 1982. As of October 2025, the Comeng fleet comprises approximately 111 active 3-car sets, though withdrawals commenced in late 2021 with the introduction of newer High Capacity Metro Trains (HCMT), targeting the retirement of tread-brake variants first; remaining units are expected to be phased out progressively through the 2030s as the network expands. In 2025, the introduction of 25 new sets began replacing Comeng trains on the Craigieburn, Upfield, and Frankston lines. Despite their impending replacement, the Comeng trains remain iconic for their durability, having undergone multiple privatization-era reallocations between operators like Connex and M Train, and for pioneering features that set standards for subsequent EMU designs.

Design and Features

Construction and Materials

The Comeng trains were originally constructed by Commonwealth Engineering (Comeng) in Dandenong, Victoria, Australia, from 1981 to 1989, yielding 190 three-car sets for a total of 570 cars, consisting of 380 motor cars and 190 trailer cars. The production timeline saw the first set delivered and entering service in 1981, with the complete fleet finalized by 1989 to support Melbourne's expanding suburban rail demands. These trains employed lightweight stainless steel body shells to enhance corrosion resistance and minimize long-term maintenance, a design choice that promoted durability in the variable coastal climate of Victoria. The single-level car bodies measured approximately 24 meters in length, with motor cars weighing approximately 50 tonnes unladen and trailer cars approximately 34 tonnes unladen, optimizing for efficient operation on the broad-gauge network. Structural innovations included bolsterless bogies for smoother ride characteristics and reduced wear, roof-integrated air-conditioning units to maximize interior space, and reinforced mountings compatible with the 1,500 V DC overhead system. The construction proved advantageous in subsequent refurbishments, enabling straightforward external modifications without structural overhauls.

Propulsion and Electrical Systems

The Comeng trains utilize a 1,500 V DC electrical system supplied via overhead lines, collected through pantographs mounted on the motor cars. This power drives four series-wound DC traction motors per motor car, providing the for the electric multiple units. The design allows for a maximum operational speed of 115 km/h on Melbourne's suburban network. The braking system combines , where is converted back into electrical power, with rheostatic braking that dissipates excess energy through on-board resistors to supplement friction brakes at higher speeds; variants include tread brakes on sets 301–554, disc brakes on sets 561–698, and experimental chopper control on sets 691–698. is rated at 0.8 m/s², while deceleration achieves 0.85 m/s² in service braking and 0.95 m/s² in emergency conditions. Control systems incorporate a deadman's handle—a combined hand and foot that applies brakes if the driver is incapacitated—ensuring operational safety from the trains' introduction. The original electrical layout includes fluorescent throughout the cars and a basic (HVAC) system designed for passenger comfort in Melbourne's variable climate. Later integrations, such as (ATC) features, were added during refurbishment programs to enhance signaling and safety compatibility with . The fleet demonstrated strong reliability in its early decades, supporting consistent service on the suburban lines prior to major overhauls.

Interior and Passenger Amenities

The interiors of the Comeng trains were optimized for high-volume suburban , emphasizing capacity over luxury with a seating arrangement that combined longitudinal bench-style seats in the motor cars for efficient space use and transverse seats in the trailer car to facilitate flow. Each three-car set (motor-trailer-motor configuration) originally provided 268 seats, supporting peak-hour demands where up to 495 additional passengers could stand, enabling a total of approximately 763 passengers per set. This design prioritized rapid boarding and alighting in busy urban environments, with standing areas enhanced by handholds along aisles and near doors. Basic passenger amenities reflected the era's standards, including overhead luggage racks for personal items, durable vinyl flooring resistant to heavy wear, and overhead fluorescent tube lighting for even illumination. Ventilation was handled by air-conditioning units mounted on the roof, a pioneering feature that provided cooled air throughout the passenger saloon—the first such system in Melbourne's suburban fleet. Early public address systems delivered simple audio announcements for station stops and safety messages, while the overall aesthetic featured blue-textured upholstery and white wall panels aligning with the external Metro Trains branding for a cohesive appearance. Accessibility was limited in the original design, lacking dedicated spaces or priority areas, as the focus remained on maximizing general capacity for able-bodied commuters during rush hours. Later refurbishment programs introduced enhancements to seating and amenities, but the foundational layout endured for decades.

History

Development and Production

In the , the Victorian government initiated efforts to modernize Melbourne's suburban rail network, driven by rising passenger demand and the need to replace outdated wooden-bodied Tait and Harris that were increasingly unreliable and unsuitable for peak-hour services. In 1979, VicRail awarded a contract to for the manufacture of new electric multiple units to support this renewal program. The initial order was for 100 three-car sets (300 cars), later increased to 190 sets (570 cars total) due to reliability issues with the Harris fleet, necessitating faster replacement. The design drew influences from Sydney's experimental double-deck trains but ultimately favored single-level construction to reduce costs and ensure compatibility with Melbourne's existing tracks, platforms, and loading gauges. Production began at Comeng's Dandenong facility in September 1981, with the first three-car sets (configured as motor-trailer-motor) rolling out for testing later that year. By 1988, production had progressed significantly, with the final sets completed in 1989.

Introduction to Service

The first Comeng set, consisting of power cars 301M and 302M with trailer 1001T, was delivered to the in 1981 for testing on Melbourne's suburban network. Following successful trials, this prototype set entered on 28 September 1981, marking the debut of the new fleet designed to modernize suburban operations with air-conditioned, stainless-steel construction. The rollout of the Comeng fleet occurred progressively from 1981 to 1989, with 190 three-car sets ultimately produced to replace aging wooden-bodied Tait and Harris trains. Initial deployments focused on outer suburban lines, including Pakenham, Cranbourne, and Frankston, where they helped alleviate capacity constraints on longer routes amid growing commuter demand in Melbourne's expanding metropolitan area. During the early operational years, the Comeng trains encountered typical teething issues common to new introductions, such as adjustments to alignment for reliable overhead current collection and optimizing air-conditioning performance in varying weather conditions; these were largely addressed through engineering modifications by 1985. Integration with the existing fleet proceeded smoothly, enabling full Comeng operations on select lines by the late , while the trains wore the distinctive initial VicRail "" livery of orange with cream accents.

Refurbishment Programs

The Comeng train fleet underwent a significant mid-life refurbishment program in the early 2000s, led by the private rail operators and M>Train to extend and modernize aging components. Upon , the 190-set fleet was split approximately 90 to Connex and 100 to M>Train; the program covered about 114 sets, divided roughly equally between the two operators. Connex engaged at its Ballarat facility to overhaul approximately 57 sets from 2000 to 2003, while M>Train contracted EDI Rail (later Downer EDI) at Maryborough to handle the remaining sets over a similar period, completing work by 2003. This initiative addressed wear from two decades of intensive suburban service, focusing on structural, electrical, and passenger-facing upgrades. Key elements of the refurbishment included comprehensive interior renewals to enhance durability and comfort. Alstom's work featured new fiberglass-reinforced panels, updated padded seating arrangements with improved , and refreshed flooring to replace original materials prone to degradation. EDI Rail's efforts emphasized similar interior overhauls alongside exterior repaints in the operators' distinctive liveries—red and white for Connex sets and yellow and green for M>Train. These changes not only revitalized the trains' appearance but also increased space, enabling higher load standards without compromising . External repaints extended to underbody and roof components for protection, contributing to overall fleet longevity. A follow-up initiative, known as the Stage 2 refurbishment, targeted 20 high-mileage sets between 2008 and 2010 under Metro Trains Melbourne's early operations. This focused on interior high-wear areas, including replacement of damaged floor coverings, wall panels, and information systems to ensure compatibility across the unified fleet post-privatization merger. The program built on the earlier overhauls by standardizing electronics like public address and setups, facilitating mixed-set operations network-wide. Overall, these refurbishments improved fleet reliability and experience, with post-program assessments noting enhanced and comfort metrics.

Major Modifications and Upgrades

Following the comprehensive refurbishment programs of the early , the Comeng fleet received targeted post-2010 modifications to enhance , , and operational reliability amid growing network demands. These upgrades built on prior overhauls by addressing evolving regulatory requirements and passenger needs, particularly in the areas of door functionality and interior layout. As part of improvements, priority seating and spaces with floor decals were added across the fleet to comply with the Disability Standards for Accessible 2002, improving onboard inclusivity without altering the core seating capacity significantly. Door safety upgrades, including overhauls with new chains and interlock systems, began in 2017 as part of the program to improve platform compatibility and passenger safety at varying station lengths. These enhancements addressed vulnerabilities identified in earlier audits, ensuring doors remained closed during travel but could be manually opened by passengers at stations, with releases accessible for rapid evacuation if needed. The Comeng Life Extension Project from to , targeting the entire fleet with comprehensive mechanical and electrical overhauls at a cost of A$75 million, included replacing worn bogies for improved stability and ride quality, alongside extensive electrical rewiring to modernize control systems and integrate LED lighting compatible with the trains' aging . These interventions extended operational viability to at least 2032 for select units, allowing the fleet to bridge the gap until full replacement by newer models like the X'Trapolis 2. The program prioritized high-impact engineering fixes to reduce maintenance downtime and enhance reliability on busy suburban routes, conducted in three stages. Additionally, horn upgrades occurred between 2020 and 2024, replacing the original multi-chime units with quieter Zöllner Makrofon single-tone horns on all remaining operational sets to align with updated regulations. The rollout, completed by March 2024, followed successful trials and reduced audible disturbances near residential areas while maintaining effective warning signals for level crossings and stations.

Operations

Fleet Deployment and Utilization

The Comeng fleet played a central role in Melbourne's suburban rail operations from the through the 2020s, forming the backbone of services across the metropolitan network. By the early , following the completion of production in 1988, the fleet consisted of approximately 95 six-car sets (equivalent to 190 three-car units), with the majority deployed in daily service on all non-City Loop lines to meet growing demand. In the , allocation patterns shifted to concentrate Comeng sets on key corridor groups, reflecting network optimization and the introduction of newer on other lines. According to the Network Development Plan, Stage 1 deployment (circa ) assigned 43 sets to the Northern group (serving lines like Craigieburn, Upfield, and Hurstbridge), 27 sets to the Dandenong group (including the busy Pakenham and Cranbourne lines), 20 sets to the Cross-City group, and just 3 sets to the group (Belgrave and Lilydale lines). On high-demand routes such as Pakenham and Cranbourne, Comeng trains typically operated in 6-car formations to accommodate peak-hour loads, supporting efficient throughput on these electrified corridors. The fleet's flexibility allowed for reallocation during special events, drawing from the available pool to supplement regular services across the network. Utilization metrics highlight the Comeng fleet's intensive role in the , when it comprised the largest portion of the operational trains and contributed substantially to overall network capacity. The metropolitan heavy rail network, heavily reliant on Comeng sets during this period, saw growth of over 90% since the late , with Comeng operations facilitating much of this volume. In the 2020s, following the introduction of High Capacity Metro Trains (HCMT) in 2021, Comeng sets were cascaded to other corridors, including the Northern (Craigieburn and Upfield) and Frankston lines. As of October 2025, 111 three-car sets remain active across the network, though targeted withdrawals of tread-brake variants continue, with further reductions expected from deliveries on Frankston, Upfield, and Craigieburn lines. Adaptations for network changes ensured continued compatibility, including integration with signaling upgrades in the mid-2010s. For instance, automated signaling enhancements on the were completed in 2013, while high-capacity signaling trials and implementations began on Northern and Cross-City corridors around 2016, allowing Comeng trains to operate under improved automatic block systems for greater reliability and reductions.

Performance and Incidents

The Comeng trains demonstrated solid reliability throughout their , supported by rigorous programs that kept them operational for nearly four decades. By the mid-2010s, the fleet achieved a mean distance between failures (MDBF) approaching the franchise target of 19,000 km per service-affecting failure, reflecting improvements from the 2000–2003 mid-life refurbishment and the 2017–2021 Life Extension Project, which upgraded 75% of units with enhanced mechanical systems and diagnostics. Energy efficiency saw gains post-refurbishment through LED lighting upgrades across 136 units, yielding annual savings of approximately 2,000 MWh and reducing lighting power by up to 40%, though was not a feature of the Comeng design. Notable incidents highlighted areas for safety enhancements. In February 2003, a Comeng set (393M-1064T-394M) experienced a runaway from Broadmeadows station due to a brake failure, colliding with a locomotive at Spencer Street and injuring 16 , which prompted reviews of brake pipe monitoring. A 2009 incident at Central involved a forcing open a Comeng and being dragged, resulting in a fatality and leading to fleet-wide investigations into door interlock systems and the eventual installation of externally electrically driven (EED) doors in 2023 to prevent manual overrides. Fires also occurred, including a 1983 arson-related blaze that destroyed carriage 315M at Hurstbridge and a 2002 electrical fire on 533M at Merlynston, necessitating improved fire suppression measures. The safety record of the Comeng fleet was generally strong, with zero fatalities directly attributed to inherent design flaws during suburban operations from 1981 to 2020, though minor incidents like the 2012 collision at Dandenong (involving set 305M-306M-1003T) resulted in no serious injuries but led to carriage scrapping. Derailments were rare and typically linked to external factors such as signaling errors rather than train defects. Comparatively, the Comeng outperformed the predecessor Harris trains in speed (115 km/h maximum versus 80 km/h) and passenger capacity (278 seated per 3-car set post-refurbishment versus 180), while accessibility features like low-floor modifications were added during upgrades, addressing a key limitation of the older Harris design.

Retirement and Legacy

Phasing Out and Scrapping

The retirement of the Comeng fleet commenced in 2021 alongside the introduction of High Capacity Metro Trains (HCMT), with the process accelerating after 2024 following deliveries of trains. The first scrapping occurred in February 2022, when set 338M-1092T-484M was dismantled at the Dandenong South scrapyard. Between 2023 and 2025, retirements intensified, with over 80 sets retired by mid-2025, including the scrapping of trailer cars 1143T on May 19, 2025, and 1167T on May 12, 2025. Key factors driving the phase-out include the fleet's aging infrastructure, with many units exceeding 40 years of service, and the need to replace them with High Capacity Metro Trains for improved capacity and reliability. The is scheduled to open on 30 November 2025 with limited services, expected to prompt further withdrawals on lines such as Sunbury to accommodate newer . As of November 2025, approximately 110 three-car sets remain in service, down from around 190 originally built, with a full phase-out projected by the early . Life extension efforts have delayed some retirements, but the overall withdrawal continues to prioritize operational efficiency.

Stored and Preserved Units

As the Comeng fleet undergoes gradual retirement, several units have been placed into storage, primarily at dedicated rail facilities in Victoria. At least two full three-car sets, 571M-1136T-572M and 649M-1175T-650M, have been stored at Craigieburn Workshops since 2024, awaiting potential reuse or final disposition. Individual cars, such as 1143T, have also been held in storage prior to scrapping. Preservation initiatives have focused on historically significant units to maintain examples of this iconic . The first-built set, 301M-1001T-302M, was scrapped in April 2022. Storage conditions emphasize protection from , with units at Newport Workshops sheltered under cover to prevent deterioration. By late 2025, more than 10 cars remain in this facility, pending decisions on scrapping, donation to museums, or other heritage uses. Recent scrappings have contributed to this growing pool of stored assets. Of the original 570 Comeng cars (190 three-car sets) built between 1981 and 1989, approximately 240 carriages have been scrapped by late 2025, leaving around 280 in active service and 50 in storage or potential preservation. These stored units represent efforts to balance operational needs with historical conservation amid the fleet's phase-out.

Cultural and Historical Significance

The Comeng trains represent a pivotal chapter in Melbourne's suburban rail , symbolizing the push toward modernization and of the network. Built by Commonwealth Engineering between 1981 and 1989, they replaced the aging wooden-bodied Tait and Harris trains, introducing construction, air-conditioning, and carpeted interiors that enhanced passenger comfort and operational efficiency. This transition supported the expansion of services to outer suburbs, accommodating and transforming daily for hundreds of thousands of Melburnians. As the backbone of Metro Trains Melbourne's fleet for over four decades, the Comeng cars have carried millions of passengers, contributing to the network's role in connecting the city's sprawling suburbs to the . Their enduring presence has made them an emblem of reliability amid evolving urban demands, with the fleet's refurbishments in the extending their and underscoring their adaptability. Featured in local media and documentaries on Victoria's rail evolution, the trains evoke a sense of historical continuity in . The Comeng's legacy extends to influencing later designs, particularly through the widespread adoption of for its corrosion resistance and reduced maintenance needs—a material choice carried forward in the series that began entering service in 2002. As retirement accelerates with the introduction of newer high-capacity trains by the early , community interest has surged, with enthusiasts organizing farewell runs and preservation efforts to honor their role in shaping Melbourne's transport identity. In recognition of their innovative , the original Comeng received commendations from engineering bodies for advancing local manufacturing standards.

References

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