Toll road

A toll road, also known as a tollway, or (mainly in the US) a turnpike, pike or expressway, is a public or private road for which a fee (or toll) is assessed for passage. It is a form of road pricing typically implemented to help recoup the costs of road construction and maintenance.

Toll roads have existed in some form since antiquity, with tolls levied on passing travelers on foot, wagon, or horseback; a practice that continued with the automobile, and many modern tollways charge fees for motor vehicles exclusively. The amount of the toll usually varies by vehicle type, weight, or number of axles, with freight trucks often charged higher rates than cars.

Tolls are often collected at toll plazas, toll booths, toll houses, toll stations, toll bars, toll barriers, or toll gates. Some toll collection points are automatic, and the user deposits money in a machine which opens the gate once the correct toll has been paid. To cut costs and minimise time delay, many tolls are collected with electronic toll collection equipment which automatically communicates with a toll payer's transponder or uses automatic number-plate recognition to charge drivers by debiting their accounts.

Criticisms of toll roads include the time taken to stop and pay the toll, and the cost of the toll booth operators—up to about one-third of revenue in some cases. Automated toll-paying systems help minimise both of these. Others object to paying "twice" for the same road, namely in fuel taxes and in tolls.

In addition to toll roads, toll bridges and toll tunnels are also used by public authorities to generate funds to repay the cost of building the structures. Some tolls are set aside to pay for future maintenance or enhancement of infrastructure, or are applied as a general fund by local governments, not being earmarked for transport facilities. This is sometimes limited or prohibited by central government legislation. Also, road congestion pricing schemes have been implemented in a limited number of urban areas as a transportation demand management tool to try to reduce traffic congestion and air pollution.

Toll roads have existed for at least the last 2,700 years, as tolls had to be paid by travellers using the Susa–Babylon highway under the regime of Ashurbanipal, who reigned in the seventh century BC.

Aristotle and Pliny refer to tolls in Arabia and other parts of Asia. In India, before the fourth century BC, the Arthashastra notes the use of tolls. Germanic tribes charged tolls to travellers across mountain passes.

Most roads were not freely open to travel on in Europe during the Middle Ages, and the toll was one of many feudal fees paid for rights of usage in everyday life. Some major European "highways", such as the Via Regia and Via Imperii, offered protection to travelers in exchange for paying the royal toll.