Proof-of-payment (POP) or proof-of-fare (POF) is an
honor
Honour ( Commonwealth English) or honor (American English; see spelling differences) is a quality of a person that is of both social teaching and personal ethos, that manifests itself as a code of conduct, and has various elements such as val ...
-based
fare
A fare is the fee paid by a passenger for use of a public transport system: rail, bus, taxi, etc. In the case of air transport, the term airfare is often used. Fare structure is the system set up to determine how much is to be paid by various p ...
collection system used on many
public transportation
Public transport (also known as public transit, mass transit, or simply transit) are forms of transport available to the general public. It typically uses a fixed schedule, route and charges a fixed fare. There is no rigid definition of whi ...
systems. Instead of checking each passenger as they enter a
fare control
In rail transport, the paid area is a dedicated "inner" zone in a railway station or metro station, accessible via turnstiles or other barriers, to get into which, visitors or passengers require a valid ticket, checked smartcard or a pass. A s ...
zone, passengers are required to carry a
paper ticket, transit pass, transit smartcard — or open payment methods such as contactless credit or debit cards (if applicable) — after swiping or tapping on smart card readers, to prove that they have paid the valid fare. Fares are enforced via random spot-checks by inspectors such as
conductors or enforcement officers, to ensure that passengers have paid their fares and are not committing
fare evasion
Fare evasion or fare dodging is the act of travel without payment on public transit. When considered problematic, it is mitigated by revenue protection officers and ticket barriers, staffed or automatic, are in place to ensure only those with va ...
. On many systems, a passenger can purchase a single-use ticket or multi-use pass at any time in advance, but must insert the ticket or pass into a validation machine immediately before use. Validation machines in stations or on board vehicles
time stamp
A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second. Timestamps do not have to be based on some absolu ...
the ticket. The ticket is then valid for some period of time after the stamped time.
This method is implemented when the transit authority believes it will lose less money to the resultant fare evasion than it would cost to install and maintain a more direct collection method. It may be used in systems whose passenger volume and density are not very high most of the time—as passenger volumes increase, more-direct collection methods become more profitable. However, in some countries it is common even on systems with very high passenger volume. Proof-of-payment is usually applied on
one-person operated rail and road vehicles as well as on
automatically operated rail lines.
The honor system can be complemented with a more direct collection approach where this would be feasible—a transit authority using POP will usually post fare inspectors, sometimes armed as a police force, to man entrances to stations on a discretionary basis when a high volume of passengers is expected. For example, transit users leaving a
stadium
A stadium (: stadiums or stadia) is a place or venue for (mostly) outdoor sports, concerts, or other events and consists of a field or stage completely or partially surrounded by a tiered structure designed to allow spectators to stand or sit ...
after a major concert or sporting event will likely have to buy a ticket from an attendant (or show proof of payment) to gain access to the station serving the stadium. Direct fare collection methods may also be used at major hubs in systems that otherwise use POP. An example of this is the
Tower City station on
Cleveland
Cleveland is a city in the U.S. state of Ohio and the county seat of Cuyahoga County. Located along the southern shore of Lake Erie, it is situated across the Canada–U.S. maritime border and approximately west of the Ohio-Pennsylvania st ...
's
RTA Rapid Transit Red Line, which uses
faregates.
Travel without a valid ticket is not usually a criminal offense, but a
penalty fare
A penalty fare, standard fare, or fixed penalty notice is a special, usually higher, fare charged because a passenger using public transport did not comply with the normal ticket purchasing rules. It should not be confused with an unpaid fares ...
or a fine can be charged.
Advantages and disadvantages

Advantages of proof-of-payment include lower labor costs for fare collection, simpler station design, easier access for mobility-impaired passengers, easier access for those carrying packages or in case of an emergency, and a more open feel for passengers. On buses, proof-of-payment saves drivers the time needed to collect fares, and makes it possible for all doors to be used for boarding. Validated tickets can double as
transfers between lines. Collecting fares outside a bus "offers the greatest potential for reducing
dwell time."
Disadvantages include higher rates of fare evasion, reduced security on station platforms when no barrier is used, increased potential of
racial profiling
Racial profiling or ethnic profiling is the offender profiling, selective enforcement or selective prosecution based on race or ethnicity, rather than individual suspicion or evidence. This practice involves discrimination against minority pop ...
and other unequal enforcement as "likely fare evaders" are targeted, and regularly exposing passengers to unpleasant confrontational situations when a rider without the proper proof is detained and removed from the vehicle. Visitors unfamiliar with a system's validation requirements who innocently misunderstand the rules are especially likely to get into trouble.
Worldwide uses
Proof-of-payment is popular in Germany, where it was widely introduced during the labor shortages resulting from the
Economic Miracle of the 1960s. It has also been adopted in Eastern Europe and Canada and has made some inroads in newer systems in the United States. The first use of the term "POP" or "Proof of Payment" on a rail line in North America is believed to have been in
Edmonton
Edmonton is the capital city of the Provinces and territories of Canada, Canadian province of Alberta. It is situated on the North Saskatchewan River and is the centre of the Edmonton Metropolitan Region, which is surrounded by Central Alberta ...
in 1980. Since then, many new
light rail
Light rail (or light rail transit, abbreviated to LRT) is a form of passenger urban rail transit that uses rolling stock derived from tram technology National Conference of the Transportation Research Board while also having some features from ...
,
streetcar
A tram (also known as a streetcar or trolley in Canada and the United States) is an urban rail transit in which vehicles, whether individual railcars or multiple-unit trains, run on tramway tracks on urban public streets; some include s ...
, and
bus rapid transit systems have adopted the procedure, mainly to speed up boarding by avoiding the hassles of crowding at doors to pay fares at a
farebox
A fare is the fee paid by a passenger for use of a public transport system: rail, bus, taxi, etc. In the case of air transport, the term airfare is often used. Fare structure is the system set up to determine how much is to be paid by various p ...
beside the driver as is common practice on traditional
bus
A bus (contracted from omnibus, 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 ...
es.
TriMet
The Tri-County Metropolitan Transportation District of Oregon (TriMet) is a Transit district, transit agency that serves most of the Oregon part of the Portland metropolitan area. Created in 1969 by the Oregon Legislative Assembly, Oregon legi ...
in Portland, Oregon was the first large transit agency to adopt proof of payment on its bus system, from September 1982 to April 1984. It was discontinued after finding that fare evasion and vandalism increased and little productivity was added through drivers waiting for fares to be paid. San Francisco's
MUNI system became the first North American system-wide adopter of the proof-of-payment system on July 1, 2012 across its buses,
light rail
Light rail (or light rail transit, abbreviated to LRT) is a form of passenger urban rail transit that uses rolling stock derived from tram technology National Conference of the Transportation Research Board while also having some features from ...
and heritage streetcars, with the exception of
cable cars, allowing boarding on all the available doors.
References
External links
TCRP Report 80: A Toolkit for Self-Service, Barrier-Free Fare Collection(
PDF
Portable document format (PDF), standardized as ISO 32000, is a file format developed by Adobe Inc., Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, computer hardware, ...
)
{{DEFAULTSORT:ProOf-Of-Payment
Public transport fare collection