Congestion pricing
Encyclopedia
Congestion pricing or congestion charges is a system of surcharging users of a transport network
Transport network
A transport network, or transportation network in American English, is typically a network of roads, streets, pipes, aqueducts, power lines, or nearly any structure which permits either vehicular movement or flow of some commodity....

 in periods of peak demand
Demand (economics)
In economics, demand is the desire to own anything, the ability to pay for it, and the willingness to pay . The term demand signifies the ability or the willingness to buy a particular commodity at a given point of time....

 to reduce traffic congestion
Traffic congestion
Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction...

. Examples include some toll
Toll road
A toll road is a privately or publicly built road for which a driver pays a toll for use. Structures for which tolls are charged include toll bridges and toll tunnels. Non-toll roads are financed using other sources of revenue, most typically fuel tax or general tax funds...

-like road pricing
Road pricing
Road pricing is an economic concept regarding the various direct charges applied for the use of roads. The road charges includes fuel taxes, licence fees, parking taxes, tolls, and congestion charges, including those which may vary by time of day, by the specific road, or by the specific vehicle...

 fees, and higher peak charges for utilities
Public utility
A public utility is an organization that maintains the infrastructure for a public service . Public utilities are subject to forms of public control and regulation ranging from local community-based groups to state-wide government monopolies...

, public transport
Public transport
Public transport is a shared passenger transportation service which is available for use by the general public, as distinct from modes such as taxicab, car pooling or hired buses which are not shared by strangers without private arrangement.Public transport modes include buses, trolleybuses, trams...

 and slots in canal
Canal
Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...

s and airports. This variable pricing
Variable pricing
Most firms use a fixed price policy. That is, they examine the situation, determine an appropriate price, and leave the price fixed at that amount until the situation changes, at which point they go through the process again...

 strategy regulates demand, making it possible to manage congestion without increasing supply
Supply (economics)
In economics, supply is the amount of some product producers are willing and able to sell at a given price all other factors being held constant. Usually, supply is plotted as a supply curve showing the relationship of price to the amount of product businesses are willing to sell.In economics the...

. Market economics theory, which encompasses the congestion pricing concept, postulates that users will be forced to pay for the negative externalities they create, making them conscious of the costs they impose upon each other when consuming during the peak demand, and more aware of their impact on the environment
Environmental quality
Environmental quality is a set of properties and characteristics of the environment, either generalized or local, as they impinge on human beings and other organisms...

.

The application on urban roads is limited to a small number of cities, including London
London congestion charge
The London congestion charge is a fee charged for some categories of motor vehicle to travel at certain times within the Congestion Charge Zone , a traffic area in London. The charge aims to reduce congestion, and raise investment funds for London's transport system...

, Stockholm
Stockholm congestion tax
The Stockholm congestion tax , also found referred to as the Stockholm congestion charge, is a congestion pricing system implemented as a tax levied on most vehicles entering and exiting central Stockholm, Sweden...

, Singapore, and Milan
Ecopass
The Ecopass program is a traffic pollution charge implemented in Milan, Italy, as an urban toll for some motorists traveling within a designated traffic restricted zone or ZTL , corresponding to the central Cerchia dei Bastioni area and encircling around . The Ecopass was implemented as a one-year...

, as well as a few smaller towns. Four general types of systems are in use; a cordon area around a city center, with charges for passing the cordon line; area wide congestion pricing, which charges for being inside an area; a city center toll ring, with toll collection surrounding the city; and corridor or single facility congestion pricing, where access to a lane or a facility is priced.

Implementation of congestion pricing has reduced congestion in urban areas, but has also sparked criticism and public discontent. Critics maintain that congestion pricing is not equitable, places an economic burden on neighboring communities, has a negative effect on retail businesses and on economic activity in general, and is just another tax.

A survey of economic literature on the subject, however, finds that most economists agree that some form of road pricing to reduce congestion is economically viable, although there is disagreement on what form road pricing should take. They primarily argue that recent advances in technology have significantly reduced the previously high transaction costs of toll collection. Fuel taxes are not effective in reducing highway congestion, and tolls are the direct method. Also, concerns regarding fossil fuel supply and urban transport high emissions of greenhouse gas
Greenhouse gas
A greenhouse gas is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone...

es in the context of climate change
Climate change
Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years. It may be a change in average weather conditions or the distribution of events around that average...

 have renewed interest in congestion pricing, as it is considered one of the demand-side mechanisms that may reduce oil consumption.

Description

Congestion pricing is a concept from market economics
Market economy
A market economy is an economy in which the prices of goods and services are determined in a free price system. This is often contrasted with a state-directed or planned economy. Market economies can range from hypothetically pure laissez-faire variants to an assortment of real-world mixed...

 regarding the use of pricing
Free price system
A free price system or free price mechanism is an economic system where prices are set by the interchange of supply and demand, with the resulting prices being understood as signals that are communicated between producers and consumers which serve to guide the production and distribution of...

 mechanisms to charge the users of public good
Public good
In economics, a public good is a good that is non-rival and non-excludable. Non-rivalry means that consumption of the good by one individual does not reduce availability of the good for consumption by others; and non-excludability means that no one can be effectively excluded from using the good...

s for the negative externalities generated by the peak demand
Demand (economics)
In economics, demand is the desire to own anything, the ability to pay for it, and the willingness to pay . The term demand signifies the ability or the willingness to buy a particular commodity at a given point of time....

 in excess of available supply. Its economic rationale is that, at a price of zero, demand exceeds supply, causing a shortage
Economic shortage
Economic shortage is a term describing a disparity between the amount demanded for a product or service and the amount supplied in a market. Specifically, a shortage occurs when there is excess demand; therefore, it is the opposite of a surplus....

, and that the shortage should be corrected by charging the equilibrium price rather than shifting it down by increasing the supply. Usually this means increasing price
Price
-Definition:In ordinary usage, price is the quantity of payment or compensation given by one party to another in return for goods or services.In modern economies, prices are generally expressed in units of some form of currency...

s during certain periods of time or at the places where congestion occurs; or introducing a new usage tax
Pigovian tax
A Pigovian tax is a tax levied on a market activity that generates negative externalities. The tax is intended to correct the market outcome. In the presence of negative externalities, the social cost of a market activity is not covered by the private cost of the activity...

 or charge when peak demand exceeds available supply in the case of a tax-funded public good provided free at the point of usage.

According to the economic theory behind congestion pricing, the objective of this policy is the use of the price mechanism to make users more aware of the costs that they impose upon one another when consuming during the peak demand, and that they should pay for the additional congestion they create, thus encouraging the redistribution of the demand in space or in time, or shifting it to the consumption of a substitute public good
Substitute good
In economics, one way we classify goods is by examining the relationship of the demand schedules when the price of one good changes. This relationship between demand schedules leads economists to classify goods as either substitutes or complements. Substitute goods are goods which, as a result...

; for example, switching from private transport to public transport.

This pricing mechanism has been used in several public utilities and public services for setting higher prices during congested periods, as a means to better manage the demand for the service, and whether to avoid expensive new investments just to satisfy peak demand, or because is not economically or financially feasible to provide additional capacity to the service. Congestion pricing has been widely used by telephone
Telephone
The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...

 and electric utilities
Electric utility
An electric utility is a company that engages in the generation, transmission, and distribution of electricity for sale generally in a regulated market. The electrical utility industry is a major provider of energy in most countries. It is indispensable to factories, commercial establishments,...

, metros
Rapid transit
A rapid transit, underground, subway, elevated railway, metro or metropolitan railway system is an electric passenger railway in an urban area with a high capacity and frequency, and grade separation from other traffic. Rapid transit systems are typically located either in underground tunnels or on...

, railways and autobus services, and has been proposed for charging internet access
Internet access
Many technologies and service plans for Internet access allow customers to connect to the Internet.Consumer use first became popular through dial-up connections in the 20th century....

. It also has been extensively studied and advocated by mainstream transport economists for port
Port
A port is a location on a coast or shore containing one or more harbors where ships can dock and transfer people or cargo to or from land....

s, waterway
Waterway
A waterway is any navigable body of water. Waterways can include rivers, lakes, seas, oceans, and canals. In order for a waterway to be navigable, it must meet several criteria:...

s, airport
Airport
An airport is a location where aircraft such as fixed-wing aircraft, helicopters, and blimps take off and land. Aircraft may be stored or maintained at an airport...

s and road pricing
Road pricing
Road pricing is an economic concept regarding the various direct charges applied for the use of roads. The road charges includes fuel taxes, licence fees, parking taxes, tolls, and congestion charges, including those which may vary by time of day, by the specific road, or by the specific vehicle...

, though actual implementation is rather limited due to the controversial issues subject to debate regarding this policy, particularly for urban roads, such as undesirable distribution effects, the disposition of the revenues raised, and the social and political acceptability of the congestion charge.

Congestion pricing is one of a number of alternative demand side (as opposed to supply side) strategies offered by economists to address traffic congestion
Traffic congestion
Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction...

. Congestion is considered a negative externality
Externality
In economics, an externality is a cost or benefit, not transmitted through prices, incurred by a party who did not agree to the action causing the cost or benefit...

 by economists. An externality occurs when a transaction causes costs or benefits to a third party, often, although not necessarily, from the use of a public good. For example, if manufacturing or transportation cause air pollution imposing costs on others when making use of public air. Congestion pricing is an efficiency pricing
Pareto efficiency
Pareto efficiency, or Pareto optimality, is a concept in economics with applications in engineering and social sciences. The term is named after Vilfredo Pareto, an Italian economist who used the concept in his studies of economic efficiency and income distribution.Given an initial allocation of...

 strategy that requires the users to pay more for that public good, thus increasing the welfare gain or net benefit for society.

Nobel-laureate William Vickrey
William Vickrey
William Spencer Vickrey was a Canadian professor of economics and Nobel Laureate. Vickrey was awarded the Nobel Memorial Prize in Economics with James Mirrlees for their research into the economic theory of incentives under asymmetric information...

 is considered by some to be the father of congestion pricing, as he first proposed it for the New York City Subway
New York City Subway
The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, a subsidiary agency of the Metropolitan Transportation Authority and also known as MTA New York City Transit...

 system in 1952. In the road transportation arena these theories were extended by Maurice Allais
Maurice Allais
Maurice Félix Charles Allais was a French economist, and was the 1988 winner of the Nobel Memorial Prize in Economics "for his pioneering contributions to the theory of markets and efficient utilization of resources."...

, Gabriel Roth
Gabriel Roth
Gabriel Fernando Roth is an Agentine footballer playing for Rangers.-External links: * at Terra.com.ar * at BDFA...

 who was instrumental in the first designs and upon whose World Bank
World Bank
The World Bank is an international financial institution that provides loans to developing countries for capital programmes.The World Bank's official goal is the reduction of poverty...

 recommendation the first system was put in place in Singapore, and Reuben Smeed
Reuben Smeed
Reuben Jacob Smeed was a British statistician and transport researcher.He obtained a degree in mathematics and PhD in aeronautical engineering from Queen Mary's College before entering academia as a teacher of mathematics....

, the deputy director of the Transport and Road Research Laboratory
Transport Research Laboratory
TRL is a British transport consultancy and research organisation based at Wokingham Berkshire with approximately 500 staff. TRL is owned by the Transport Research Foundation , which is overseen by 80 sector members from the transport industry. TRL also own small UK regional offices situated in...

 whose ideas presented in his report
Smeed Report
The Smeed Report was a study into alternative methods of charging for road use, commissioned by the UK government between 1962 and 1964. The report stopped short of an unqualified recommendation for road pricing but concluded that it could work and should be considered for congested road...

 to the British government were rejected by successive governments since the 1960s.

The transport economics rationale for implementing congestion pricing on roads, described as "one policy response to the problem of congestion", was summarized in a testimony to the United States Congress
United States Congress
The United States Congress is the bicameral legislature of the federal government of the United States, consisting of the Senate and the House of Representatives. The Congress meets in the United States Capitol in Washington, D.C....

 Joint Economic Committee in 2003: "congestion is considered to arise from the mispricing of a good; namely, highway capacity at a specific place and time. The quantity supplied (measured in lane-miles) is less than the quantity demanded at what is essentially a price of zero. If a good or service is provided free of charge, people tend to demand more of it – and use it more wastefully – than they would if they had to pay a price that reflected its cost. Hence, congestion pricing is premised on a basic economic concept: charge a price in order to allocate a scarce resource to its most valuable use, as evidenced by users' willingness to pay for the resource".

Urban roads

For the broader concept on roads charges see road pricing
Road pricing
Road pricing is an economic concept regarding the various direct charges applied for the use of roads. The road charges includes fuel taxes, licence fees, parking taxes, tolls, and congestion charges, including those which may vary by time of day, by the specific road, or by the specific vehicle...

.


Practical implementations of road congestion pricing are found almost exclusively in urban areas, because traffic congestion
Traffic congestion
Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction...

 is common in and around city centers. Autoroute A1
A1 autoroute (France)
The A1 Autoroute, also known as l'autoroute du Nord , is the busiest of France's autoroutes. With a length of , it connects Paris with the northern city of Lille. It is managed by the Société des Autoroutes du Nord et de l'Est de la France...

 in Northern France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 is one of the few cases of congestion pricing implemented outside of urban areas. This is an expressway connecting Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

 to Lille
Lille
Lille is a city in northern France . It is the principal city of the Lille Métropole, the fourth-largest metropolitan area in the country behind those of Paris, Lyon and Marseille. Lille is situated on the Deûle River, near France's border with Belgium...

, and since 1992 congestion prices have been applied during weekends with the objective of spreading demand on the trip back to Paris on Sunday afternoons and evenings. As congestion pricing has been increasing worldwide, the schemes implemented have been classified into four different types: cordon area around a city center; area wide congestion pricing; city center toll ring; and corridor or single facility congestion pricing.

Cordon area and area wide

Cordon area congestion pricing is a fee or tax paid by users to enter a restricted area, usually within a city center, as part of a demand management
Transportation Demand Management
Transportation demand management, traffic demand management or travel demand management is the application of strategies and policies to reduce travel demand , or to redistribute this demand in space or in time.In transport as in any network, managing demand can be a cost-effective alternative to...

 strategy to relieve traffic congestion within that area. The economic rationale for this pricing scheme is based on the externalities or social cost
Social cost
Social cost, in economics, is generally defined in opposition to "private cost". In economics, theorists model individual decision-making as measurement of costs and benefits...

s of road transport, such as air pollution
Air pollution
Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or cause damage to the natural environment or built environment, into the atmosphere....

, noise, traffic accidents, environmental and urban deterioration, and the extra costs and delays imposed by traffic congestion
Traffic congestion
Traffic congestion is a condition on road networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction...

 upon other drivers when additional users enter a congested road.

The first implementation of such a scheme was Singapore Area Licensing Scheme
Singapore Area Licensing Scheme
The Singapore Area Licensing Scheme , introduced in 1975, charged drivers entering downtown Singapore, and thereby aimed to manage traffic demand. This was the first urban traffic congestion pricing scheme to be successfully implemented in the world...

 in 1975, together with a comprehensive package of road pricing
Road pricing
Road pricing is an economic concept regarding the various direct charges applied for the use of roads. The road charges includes fuel taxes, licence fees, parking taxes, tolls, and congestion charges, including those which may vary by time of day, by the specific road, or by the specific vehicle...

 measures, stringent car ownership rules and improvements in mass transit. Thanks to technological advances in electronic toll collection
Electronic toll collection
Electronic toll collection , an adaptation of military "identification friend or foe" technology, aims to eliminate the delay on toll roads by collecting tolls electronically. It is thus a technological implementation of a road pricing concept...

, electronic detection, and video surveillance technology, collecting congestion fees has become easier. Singapore upgraded its system in 1998, and similar pricing schemes were implemented in Rome in 2001, London
London congestion charge
The London congestion charge is a fee charged for some categories of motor vehicle to travel at certain times within the Congestion Charge Zone , a traffic area in London. The charge aims to reduce congestion, and raise investment funds for London's transport system...

 in 2003 with extensions in 2007; Stockholm
Stockholm congestion tax
The Stockholm congestion tax , also found referred to as the Stockholm congestion charge, is a congestion pricing system implemented as a tax levied on most vehicles entering and exiting central Stockholm, Sweden...

 in 2006, as seven month trial, and then on a permanent basis. In January 2008 Milan
Milan
Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

 began a one-year trial program called Ecopass
Ecopass
The Ecopass program is a traffic pollution charge implemented in Milan, Italy, as an urban toll for some motorists traveling within a designated traffic restricted zone or ZTL , corresponding to the central Cerchia dei Bastioni area and encircling around . The Ecopass was implemented as a one-year...

, charging low emission standard vehicles and exempting cleaner and alternative fuel vehicle
Alternative fuel vehicle
An alternative fuel vehicle is a vehicle that runs on a fuel other than "traditional" petroleum fuels ; and also refers to any technology of powering an engine that does not involve solely petroleum...

s. The Ecopass program was extended until December 31, 2011,
and beginning on January 1, 2012 a new scheme will be introduced converting it from a pollution-charge to a congestion charge.

Although there has not yet been a comprehensive study, initial reports from the cities that have implemented congestion pricing schemes show traffic volume reductions from 10% to 30%, as well as reduced air pollution. Also, all cities report public controversy before and after implementation, making political feasibility a critical issue.

Singapore and Stockholm charge a congestion fee every time a user crosses the cordon area, while London charges a daily fee for any vehicle driving in a public road within the congestion charge zone, regardless of how many times the user crosses the cordon. Stockholm has put a cap on the maximum daily tax, while in Singapore the charge is based on a pay-as-you-use principle, and rates are set based on traffic conditions at the pricing points, and reviewed on a quarterly basis. Through this policy, the Land Transport Authority
Land Transport Authority
The Land Transport Authority is a statutory board under the Ministry of Transport of the Singapore Government.-History:...

 (LTA) reports that the electronic road pricing "has been effective in maintaining an optimal speed range of 45 to 65 km/h for expressways and 20 to 30 km/h for arterial roads".
Singapore

In an effort to improve the pricing mechanism, and, to introduce real-time variable pricing
Variable pricing
Most firms use a fixed price policy. That is, they examine the situation, determine an appropriate price, and leave the price fixed at that amount until the situation changes, at which point they go through the process again...

,
Singapore's LTA
Land Transport Authority
The Land Transport Authority is a statutory board under the Ministry of Transport of the Singapore Government.-History:...

 together with IBM
IBM
International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

, ran a pilot from December 2006 to April 2007, with a traffic estimation and prediction tool
Traffic estimation and prediction system
Traffic estimation and prediction systems have the potential to improve traffic conditions and reduce travel delays by facilitating better utilization of available capacity. These systems exploit currently available and emerging computer, communication, and control technologies to monitor, manage,...

 (TrEPS), which uses historical traffic data and real-time feeds with flow conditions from several sources, in order to predict the levels of congestion up to an hour in advance. By accurately estimating prevailing and emerging traffic conditions, this technology is expected to allow variable pricing, together with improved overall traffic management, including the provision of information in advance to alert drivers about conditions ahead, and the prices being charged at that moment.
London


A proposal by former Mayor of London Ken Livingstone
Ken Livingstone
Kenneth Robert "Ken" Livingstone is an English politician who is currently a member of the centrist to centre-left Labour Party...

 would have resulted in a new pricing structure based on potential CO2 emission rates by October 2008. The goal was that vehicles with the very lowest CO2 emission rates would be exempted, and those with higher emission rates would pay a new higher charge of , with the rest paying the same charge they pay today. However, the current Mayor of London, Boris Johnson
Boris Johnson
Alexander Boris de Pfeffel Johnson is a British journalist and Conservative Party politician, who has been the elected Mayor of London since 2008...

, announced at the beginning of his administration that he would reform the congestion charge.

Johnson announced on July 2008 that the new CO2 charging structure will no longer be implemented. Among other reasons, he said the environmental charge would encourage travel by thousands of smaller vehicles free of charge, resulting in increase congestion and pollution. He also discarded plans for extending the charge zone to the suburbs, and announced he will review the western extension implemented in 2007, based on a public consultation planned for September 2008. Having held a five-week public consultation with residents in the autumn of 2008, Johnson decided to remove the 2007 Western Extension from the congestion charging zone beginning on January 4, 2011, to increase the basic charge to , and also to introduce an automated payment system called Congestion Charging Auto Pay (CC Auto Pay), which will charge vehicles based on the number of charging days a vehicle travels within the charging zone each month, and the drivers of these vehicles will pay a reduced daily charge.

"Old town" centres

Around Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

 several small cities, such as Durham
Durham
Durham is a city in north east England. It is within the County Durham local government district, and is the county town of the larger ceremonial county...

, England; Znojmo
Znojmo
Znojmo is a city in the South Moravian Region of the Czech Republic, near the border with Lower Austria, connected to Vienna by railway and road . The royal city of Znojmo was founded shortly before 1226 by King Ottokar I on the plains in front of Znojmo Castle...

, Czech Republic; Riga
Riga
Riga is the capital and largest city of Latvia. With 702,891 inhabitants Riga is the largest city of the Baltic states, one of the largest cities in Northern Europe and home to more than one third of Latvia's population. The city is an important seaport and a major industrial, commercial,...

, Latvia; and Valletta
Valletta
Valletta is the capital of Malta, colloquially known as Il-Belt in Maltese. It is located in the central-eastern portion of the island of Malta, and the historical city has a population of 6,098. The name "Valletta" is traditionally reserved for the historic walled citadel that serves as Malta's...

, Malta, have implemented congestion pricing to reduce traffic crowding, parking problems and pollution, particularly during the peak tourism season.

Durham
Durham City congestion charge
The Durham City congestion charge was the first congestion charge to be introduced in the UK in October 2002.Durham County Council introduced the toll for drivers using 1,000-year-old Saddler Street in the city centre which stands on the peninsula above the River Wear. This is the only public...

 introduced charges in October 2002, reducing vehicle traffic by 85% after a year; prior to this 3,000 daily vehicles had shared the streets with 17,000 pedestrians.

Valletta has reduced daily vehicles entering the city from 10,000 to 7,900; making 400 readily available parking places in the center. There has been a 60% drop in car stays by non-residents of more than eight hours, but there has been a marked increase of 34% in non-residential cars visiting the city for an hour or less.

Rejected proposals

Hong Kong
Hong Kong
Hong Kong is one of two Special Administrative Regions of the People's Republic of China , the other being Macau. A city-state situated on China's south coast and enclosed by the Pearl River Delta and South China Sea, it is renowned for its expansive skyline and deep natural harbour...

 conducted a pilot test on an electronic congestion pricing
Electronic Road Pricing (Hong Kong)
The Hong Kong Electronic Road Pricing is an electronic toll collection scheme first proposed in Hong Kong as early as in the 1980s to manage traffic by congestion pricing...

 system between 1983 and 1985 with positive results. However, public opposition against this policy stalled its permanent implementation.

In 2002 Edinburgh, United Kingdom, initiated a implementation process; a referendum
Referendum
A referendum is a direct vote in which an entire electorate is asked to either accept or reject a particular proposal. This may result in the adoption of a new constitution, a constitutional amendment, a law, the recall of an elected official or simply a specific government policy. It is a form of...

 was conducted in 2005, with a majority of 74.4% rejecting the proposal.

Councils from across the West Midlands
West Midlands (county)
The West Midlands is a metropolitan county in western central England with a 2009 estimated population of 2,638,700. It came into existence as a metropolitan county in 1974 after the passage of the Local Government Act 1972, formed from parts of Staffordshire, Worcestershire and Warwickshire. The...

 in the United Kingdom, including Birmingham
Birmingham
Birmingham is a city and metropolitan borough in the West Midlands of England. It is the most populous British city outside the capital London, with a population of 1,036,900 , and lies at the heart of the West Midlands conurbation, the second most populous urban area in the United Kingdom with a...

 and Coventry
Coventry
Coventry is a city and metropolitan borough in the county of West Midlands in England. Coventry is the 9th largest city in England and the 11th largest in the United Kingdom. It is also the second largest city in the English Midlands, after Birmingham, with a population of 300,848, although...

, rejected the idea of imposing congestion pricing schemes on the area in 2008, despite promises from central government of transport project funding in exchange for the implementation of a road pricing pilot scheme.

In 2007, New York City
New York congestion pricing
New York congestion pricing was a proposed traffic congestion fee for vehicles traveling into or within the Manhattan central business district of New York City...

 in the United States shelved a proposal for a three-year pilot program for implementation in Manhattan
Manhattan
Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...

, and a new proposition was denied in 2008, with a potential federal grants of USD
United States dollar
The United States dollar , also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents or pennies....

 354 million being reallocated to other cities.

Greater Manchester, United Kingdom, was considering a scheme with two cordons, one covering the main urban core of the Greater Manchester Urban Area
Greater Manchester Urban Area
The Greater Manchester Urban Area is an area of land defined by the Office for National Statistics consisting of the large conurbation that encompasses the city of Manchester and the continuous metropolitan area that spreads outwards from it, forming much of Greater Manchester in North West England...

 and another covering the Manchester city centre
Manchester City Centre
Manchester city centre is the central business district of Manchester, England. It lies within the Manchester Inner Ring Road, next to the River Irwell...

. The measure was supported by the government, but three local authorities rejected it (Bury
Bury
Bury is a town in Greater Manchester, England. It lies on the River Irwell, east of Bolton, west-southwest of Rochdale, and north-northwest of the city of Manchester...

, Trafford
Trafford
The Metropolitan Borough of Trafford is a metropolitan borough of Greater Manchester, England. It has a population of 211,800, covers , and includes the towns of Altrincham, Partington, Sale, Stretford, and Urmston...

 and Stockport
Metropolitan Borough of Stockport
The Metropolitan Borough of Stockport is a metropolitan borough of Greater Manchester, in north west England, centred around the town of Stockport. It has a population of about 280,600 and includes the outyling areas of Cheadle and Cheadle Hulme, Marple, Bredbury, Reddish and Romiley...

); the support of two-thirds of Manchester's 10 local councils was needed for it to be implemented. A comprehensive transport investment package for Manchester, which included the congestion pricing element, was released for further public consultation and was to be subject of a referendum in December 2008. On 12 December 2008 the scheme was overwhelmingly rejected by 10 out of 10 councils by a public referendum.

Current proposals

In August 2007, the United States Department of Transportation
United States Department of Transportation
The United States Department of Transportation is a federal Cabinet department of the United States government concerned with transportation. It was established by an act of Congress on October 15, 1966, and began operation on April 1, 1967...

 selected five metropolitan areas to initiate congestion pricing demonstration projects under the Urban Partnerships Congestion Initiative, for US$ 1 billion of federal funding. The five projects under this initiative are; Golden Gate Bridge
Golden Gate Bridge
The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the opening of the San Francisco Bay into the Pacific Ocean. As part of both U.S. Route 101 and California State Route 1, the structure links the city of San Francisco, on the northern tip of the San Francisco Peninsula, to...

 in San Francisco, State Route 520 serving downtown Seattle and communities to its east, Interstate 95 between Miami and Ft. Lauderdale, Interstate 35W serving downtown Minneapolis, and a variable rate parking meter system in Chicago
Chicago
Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

, which replaced New York City after it left the program in 2008.

San Francisco transport authorities began a feasibility study in 2006 to evaluate the introduction of congestion pricing. The charge would be combined with other traffic reduction implementations, allowing money to be raised for public transit improvements and bike and pedestrian enhacements. The initial pricing scenarios were presented in public meetings conducted in December 2008, and the final study results were announced in November 2010, proposing modified alternatives based on the public's feedbacks, and the updated proposal calls for implementing a six-month to one-year trial by 2015.

In September 2011, local officials announced plans to introduce congestion pricing in Beijing
Beijing
Beijing , also known as Peking , is the capital of the People's Republic of China and one of the most populous cities in the world, with a population of 19,612,368 as of 2010. The city is the country's political, cultural, and educational center, and home to the headquarters for most of China's...

. No details have been provided regarding the magnitude of the congestion charges or the charge zone. The measure was initially proposed in 2010 and was recommended by the World Bank
World Bank
The World Bank is an international financial institution that provides loans to developing countries for capital programmes.The World Bank's official goal is the reduction of poverty...

. A similar scheme was proposed for the city Guangzhou
Guangzhou
Guangzhou , known historically as Canton or Kwangchow, is the capital and largest city of the Guangdong province in the People's Republic of China. Located in southern China on the Pearl River, about north-northwest of Hong Kong, Guangzhou is a key national transportation hub and trading port...

, Guangdong
Guangdong
Guangdong is a province on the South China Sea coast of the People's Republic of China. The province was previously often written with the alternative English name Kwangtung Province...

 province, in early 2010. The city opened a public discussion on whether to introduce congestion charges. An online survey conducted by two local news outlets found that 84.4% of respondents opposed the charges.

Urban corridors and toll rings

Congestion pricing has also been implemented in urban freeways. Between 2004 and 2005, Santiago de Chile implemented the first 100% non-stop urban toll for concessioned freeways passing through a downtown area, charging by the distance traveled. Congestion pricing is used since 2007 during rush hours in order to maintain reasonable speeds within the city's core with the aim of keeping a minimum level of service for their customers.

Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 pioneered with implementation of electronic urban tolling
Electronic toll collection
Electronic toll collection , an adaptation of military "identification friend or foe" technology, aims to eliminate the delay on toll roads by collecting tolls electronically. It is thus a technological implementation of a road pricing concept...

 in the main corridors of Norway's three major cities: Bergen
Bergen
Bergen is the second largest city in Norway with a population of as of , . Bergen is the administrative centre of Hordaland county. Greater Bergen or Bergen Metropolitan Area as defined by Statistics Norway, has a population of as of , ....

 (1986), Oslo
Oslo
Oslo is a municipality, as well as the capital and most populous city in Norway. As a municipality , it was established on 1 January 1838. Founded around 1048 by King Harald III of Norway, the city was largely destroyed by fire in 1624. The city was moved under the reign of Denmark–Norway's King...

 (1990), and Trondheim
Trondheim
Trondheim , historically, Nidaros and Trondhjem, is a city and municipality in Sør-Trøndelag county, Norway. With a population of 173,486, it is the third most populous municipality and city in the country, although the fourth largest metropolitan area. It is the administrative centre of...

 (1991). In the case of Bergen it is impossible to enter the central area by car without using a toll road, so that the effect is similar to a congestion charge. Though initially intended only to raised revenues to finance road infrastructure, the urban toll ring at Oslo created an unintended congestion pricing effect, as traffic decreased around 5%. Also the Trondheim Toll Scheme
Trondheim Toll Scheme
Trondheim Toll Scheme or Trondheim Package was the result of that in the 1980s politicians and road authorities in Trondheim, Norway wanted to accelerate the investments in roads and motorways around the city through an investment package and toll scheme to ease construction and generate more funds...

 has congestion pricing effects, as charges vary by time of the day. Norwegian authorities have been considering the use of congestion charges, as the legal basis were approved by Parliament in 2001. As of February 2008 the regulations on road pricing have however not come into force.

Single facilities

Other recent application of congestion pricing policies in the urban transportation context is to adopt an innovative tolling for a particular limited purpose. The first of this kind of specific schemes allowed users of low or single-occupancy vehicles to use a high-occupancy vehicle lane
High-occupancy vehicle lane
In transportation engineering and transportation planning, a high-occupancy vehicle lane is a lane reserved for vehicles with a driver and one or more passengers...

s (HOV) if they pay a toll. This scheme is known as high-occupancy toll (HOT) lanes, and it has been introduced mainly in the United States and Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

. The first practical implementations was California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

's private toll 91 Express Lanes, in Orange County
Orange County, California
Orange County is a county in the U.S. state of California. Its county seat is Santa Ana. As of the 2010 census, its population was 3,010,232, up from 2,846,293 at the 2000 census, making it the third most populous county in California, behind Los Angeles County and San Diego County...

 in 1995, followed in 1996 by Interstate 15
Interstate 15 in California
In the U.S. state of California, Interstate 15 is a major north–south route through the San Bernardino, Riverside, and San Diego Counties, and it has a length of in the state. It is a major thoroughfare for traffic between Southern California and Las Vegas, Nevada, as well as points beyond...

 in San Diego. There has been controversy over this concept, and HOT schemes have been called "Lexus
Lexus
is the luxury vehicle division of Japanese automaker Toyota Motor Corporation. First introduced in 1989 in the United States, Lexus is now sold globally and has become Japan's largest-selling make of premium cars. The Lexus marque is marketed in over 70 countries and territories worldwide, and has...

" lanes, as critics see this new pricing scheme as a perk to the rich.

Congestion pricing in the form of variable tolls by time-of-the-day have also been implemented in bridges and tunnels providing access to the central business district
Central business district
A central business district is the commercial and often geographic heart of a city. In North America this part of a city is commonly referred to as "downtown" or "city center"...

s of several major cities. In most cases there was a toll already in existence.
In March 2001, the Port Authority of New York and New Jersey
Port Authority of New York and New Jersey
The Port Authority of New York and New Jersey is a bi-state port district, established in 1921 through an interstate compact, that runs most of the regional transportation infrastructure, including the bridges, tunnels, airports, and seaports, within the Port of New York and New Jersey...

 implemented a discount on regular toll fees during off-peak hours for those vehicles paying electronically with an EZ Pass. These discount toll was implemented at several tunnels and bridges connecting New York City
New York City
New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

 and New Jersey
New Jersey
New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...

, including the George Washington Bridge
George Washington Bridge
The George Washington Bridge is a suspension bridge spanning the Hudson River, connecting the Washington Heights neighborhood in the borough of Manhattan in New York City to Fort Lee, Bergen County, New Jersey. Interstate 95 and U.S. Route 1/9 cross the river via the bridge. U.S...

, Lincoln Tunnel
Lincoln Tunnel
The Lincoln Tunnel is a long tunnel under the Hudson River, connecting Weehawken, New Jersey and the borough of Manhattan in New York City.-History:...

, and Holland Tunnel
Holland Tunnel
The Holland Tunnel is a highway tunnel under the Hudson River connecting the island of Manhattan in New York City with Jersey City, New Jersey at Interstate 78 on the mainland. Unusual for an American public works project, it is not named for a government official, politician, or local hero or...

, and at some other bridges administrated by PANYNJ. Since March 2008, qualified low-emission automobiles with a fuel economy
Fuel economy in automobiles
Fuel usage in automobiles refers to the fuel efficiency relationship between distance traveled by an automobile and the amount of fuel consumed....

 of at least 45 miles per gallon are eligible to receive a Port Authority Green Pass, which allows for a 50% discount during off-peak hours as compared to the regular full toll.

In January 2009, variable tolls were implemented at Sydney Harbour Bridge
Sydney Harbour Bridge
The Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail, vehicular, bicycle and pedestrian traffic between the Sydney central business district and the North Shore. The dramatic view of the bridge, the harbour, and the nearby Sydney Opera House is an iconic...

, two weeks after upgrading to 100% free-flow electronic toll collection
Electronic toll collection
Electronic toll collection , an adaptation of military "identification friend or foe" technology, aims to eliminate the delay on toll roads by collecting tolls electronically. It is thus a technological implementation of a road pricing concept...

. The highest fees are charged during the morning and afternoon peak periods; a toll 25% lower applies for the shoulder periods; and a toll lower than the previously existing is charged at nights, weekends, and public holidays. This is Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

's first road congestion pricing scheme.

In July 2010 congestion tolls were implemented at the San Francisco-Oakland Bay Bridge
San Francisco-Oakland Bay Bridge
The San Francisco – Oakland Bay Bridge is a pair of bridges spanning San Francisco Bay of California, in the United States. Forming part of Interstate 80 and of the direct road route between San Francisco and Oakland, it carries approximately 270,000 vehicles per day on its two decks...

. The Bay Bridge congestion pricing scheme charges a toll from 5 a.m. to 10 a.m. and 3 p.m. to 7 p.m., Monday through Friday. During weekends cars pay . The toll remained at the previous toll of at all other times on weekdays. According to the Bay Area Toll Authority
Bay Area Toll Authority
The Bay Area Toll Authority was created by the California State Legislature in 1997 to administer the base $1 auto toll on the San Francisco Bay Area's seven state-owned toll bridges. On January 1, 1998, the Metropolitan Transportation Commission — the transportation planning, financing and...

  fewer users are driving during the peak hours and more vehicles are crossing the Bay Bridge before and after the 5–10 a.m. period in which the congestion toll goes into effect. The agency also reported that commute delays in the first six months have dropped by an average of 15 percent compared with 2009. When the congestion tolls were proposed, the agency expected the scheme to produce a 20 to 30 percent drop in commute traffic.

Concerns and criticisms

Both in the academic literature and in practice, the implementation of congestion pricing for urban road travel has raised several concerns, and has been subject of debate and controversy.

Measurement of effects

In a road network congestion can be considered a specific measure of the time delay in a journey or time lost through traffic jams. Delays can be caused by some combination of traffic density, road capacity, and the delaying effects of other road users and traffic management schemes such as traffic lights, junctions, and street works. This can be measured as the extra journey time needed to traverse a congested route when compared to the same route with no such interference. However, this technical definition of congestion as a measurement of delay can get confused and used interchangeably with traffic density in the public mind.

Thus some congestion charging schemes have been claimed a "success" because they have achieved a significant reduction in traffic volumes, even though there was little effect on actual journey times.

To measure the true effects of any traffic management scheme it is normally necessary to establish a baseline, or "do nothing" case, which estimates the effects on the network without any changes other than normal trends and expected local changes. Notably this was not done for the London Congestion Charging Scheme
London congestion charge
The London congestion charge is a fee charged for some categories of motor vehicle to travel at certain times within the Congestion Charge Zone , a traffic area in London. The charge aims to reduce congestion, and raise investment funds for London's transport system...

, which has led to claims that it is not possible to determine the extent of the actual influence of the scheme. Regardless of the scheme's impact, in a retrospective analysis Transport for London
Transport for London
Transport for London is the local government body responsible for most aspects of the transport system in Greater London in England. Its role is to implement the transport strategy and to manage transport services across London...

 estimated there would have already been a significant reduction in traffic as a consequence of parking policies and increased congestion due to traffic management and other interventions that had the effect of reducing highway capacity. In 2006, the last year before the zone was expanded, TfL observed that traffic flows were lower than in any recent year, while network traffic speeds were also lower than in any recent year. Others have noted that changes in fuel pricing and taxation
Fuel tax
A fuel tax is an excise tax imposed on the sale of fuel. In most countries the fuel tax is imposed on fuels which are intended for transportation...

 may also have an effect on measurements of any congestion pricing scheme.

Academic debate and concerns

Even the transport economists who advocate congestion pricing have anticipated several practical limitations, concerns and controversial issues regarding the actual implementation of this policy. As summarized by Cervero:
"True social-cost pricing of metropolitan travel has proven to be a theoretical ideal that so far has eluded real-world implementation. The primary obstacle is that except for professors of transportation economics and a cadre of vocal environmentalists, few people are in favor of considerably higher charges for peak-period travel. Middle-class motorists often complain they already pay too much in gasoline taxes and registration fees to drive their cars, and that to pay more during congested periods would add insult to injury. In the United States, few politicians are willing to champion the cause of congestion pricing for fear of reprisal from their constituents. Critics also argue that charging more to drive is elitist policy, pricing the poor off of roads so that the wealthy can move about unencumbered. It is for all these reasons that peak-period pricing remains a pipe dream in the minds of many."


Both Button and Small et al., have identified the following issues:
  • The real-world demand functions for urban road travel are more complex than the theoretical functions used in transport economics analysis. Congestion pricing was developed as a first-best solution, based on the assumption that the optimal price of road space equals the marginal cost price if all other goods in the economy are also marginal cost priced. In the real world this is not true, thus, actual implementation of congestion pricing is just a proxy or second-best solution. Based on the economic principles behind congestion pricing, the optimal congestion charge should make up for the difference between the average cost paid by the driver and the marginal cost imposed on other drivers (such as extra delay) and on society as a whole (such as air pollution). The practical challenge of setting optimal link-based tolls is daunting given that neither the demand functions nor the link-specific speed-flow curves can be known precisely. Therefore, transport economists recognize that in practice setting the right price for the congestion charge becomes a trial and error experience.
  • Inequality issue: A main concern is the possibility of undesirable distribution repercussions because of the diversity of road users. The use of the tolled road depends on the user's level of income. Where some cannot afford to pay the congestion charge, then this policy is likely to privilege the middle-class and rich. The users who shift to some less-preferred alternative are also worst off. The less wealthy are the more likely to switch to public transit. Road space rationing
    Road space rationing
    Road space rationing is a travel demand management strategy aimed to reduce the negative externalities generated by peak urban travel demand in excess of available supply or road capacity, through artificially restricting demand by rationing the scarce common good road capacity, especially...

    , is another strategy generally viewed as more equitable than congestion pricing. However, high-income users can always avoid the travel restrictions by owning a second car and users with relatively inelastic demand (such as a worker who needs to transport tools to a job site) are relatively more impacted.
  • There are difficulties in deciding how to allocate the revenues raised. This is a controversial issue among scholars. The revenues can be used to improve public transport (as is the case in London), or to invest in new road infrastructure (as in Oslo). Some academics make the case that revenues should be disposed as a direct transfer payments to former road users. Congestion pricing is not intended to increase public revenues or to become just another tax, however this is precisely one of the main concerns of road users and taxpayers.


One alternative, aimed at avoiding inequality and revenue allocation issues, is to implement a rationing
Rationing
Rationing is the controlled distribution of scarce resources, goods, or services. Rationing controls the size of the ration, one's allotted portion of the resources being distributed on a particular day or at a particular time.- In economics :...

 of peak period travel through mobility rights or revenue-neutral credit-based congestion pricing. This system would be similar to the existing emissions trading
Emissions trading
Emissions trading is a market-based approach used to control pollution by providing economic incentives for achieving reductions in the emissions of pollutants....

 of carbon credit
Carbon credit
A carbon credit is a generic term for any tradable certificate or permit representing the right to emit one tonne of carbon dioxide or the mass of another greenhouse gas with a carbon dioxide equivalent equivalent to one tonne of carbon dioxide....

. Metropolitan area or city residents, or the taxpayers, would be issued mobility rights or congestion credits, and would have the option of using these for themselves, or trading or selling them to anyone willing to continue traveling by automobile beyond their personal quota. This trading system would allow direct benefits to be accrued by those users shifting to public transportation or by those reducing their peak-hour travel rather than the government.

Public controversy

Experience from the few cities where congestion pricing has been implemented shows that social and political acceptability is key. Public discontent with congestion pricing, or rejection of congestion pricing proposals, is due mainly to the inequality issues, the economic burden on neighboring communities, the effect on retail businesses and the economic activity in general, and the fears that the revenues will become just another tax.

Congestion pricing remains highly controversial with the public both before and after implementation. This has in part been resolved through referendum
Referendum
A referendum is a direct vote in which an entire electorate is asked to either accept or reject a particular proposal. This may result in the adoption of a new constitution, a constitutional amendment, a law, the recall of an elected official or simply a specific government policy. It is a form of...

s, such as after the seven-month trial period in Stockholm
Stockholm congestion tax
The Stockholm congestion tax , also found referred to as the Stockholm congestion charge, is a congestion pricing system implemented as a tax levied on most vehicles entering and exiting central Stockholm, Sweden...

; however this creates a debate as to where the border line for the referendum should go, since it often is the people living outside the urban area who have to pay the tax, while the external benefit is granted those who live within the area. In Stockholm there was a majority in the referendum within the city border (where the votes counted), but not outside.

Some concerns have also been expressed regarding the effects of cordon area congestion pricing on economic activity and land use, as the benefits are usually evaluated from the urban transportation perspective only. However, congestion pricing schemes have been used with the main objective of improving urban quality and to preserve historical heritage in the small cities.

The effects of a charge on business have been disputed; reports have shops and businesses being heavily impacted by the cost of the charge, both in terms of lost sales and increased delivery costs in London
London congestion charge
The London congestion charge is a fee charged for some categories of motor vehicle to travel at certain times within the Congestion Charge Zone , a traffic area in London. The charge aims to reduce congestion, and raise investment funds for London's transport system...

, while others show that businesses were then supporting the charge six months after implementation. Reports show business activity within the charge zone had been higher in both productivity
Productivity
Productivity is a measure of the efficiency of production. Productivity is a ratio of what is produced to what is required to produce it. Usually this ratio is in the form of an average, expressing the total output divided by the total input...

 and profitability
Profit (accounting)
In accounting, profit can be considered to be the difference between the purchase price and the costs of bringing to market whatever it is that is accounted as an enterprise in terms of the component costs of delivered goods and/or services and any operating or other expenses.-Definition:There are...

 and that the charge had a "broadly neutral impact" on the London wide economy, while others claim an average drop in business of 25% following the 2007 extension.

Other criticism has been raised concerning the environmental effects on neighborhoods bordering the congestion zone, with critics claiming that congestion pricing would create "parking lots" and add more traffic and pollution to those neighborhoods, and the imposition of a regressive tax
Regressive tax
A regressive tax is a tax imposed in such a manner that the tax rate decreases as the amount subject to taxation increases. "Regressive" describes a distribution effect on income or expenditure, referring to the way the rate progresses from high to low, where the average tax rate exceeds the...

 on some commuters. Stockholm's trial of congestion pricing, however, showed a reduction in traffic in areas outside the congestion zone. Other opponents argue that the pricing could become a tax on middle- and lower-class residents, since those citizens would be affected the most financially. The installation of cameras for tracking purposes may also raise civil liberties concerns.

Panama Canal Transit Booking System and Transit Slot Auction

The Panama Canal
Panama Canal
The Panama Canal is a ship canal in Panama that joins the Atlantic Ocean and the Pacific Ocean and is a key conduit for international maritime trade. Built from 1904 to 1914, the canal has seen annual traffic rise from about 1,000 ships early on to 14,702 vessels measuring a total of 309.6...

 has a limited capacity determined by operational times and cycles of the existing locks
Lock (water transport)
A lock is a device for raising and lowering boats between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is...

 and further constrained by the current trend towards larger (close to Panamax
Panamax
Panamax and New Panamax are popular terms for the size limits for ships traveling through the Panama Canal. Formally, the limits and requirements are published by the Panama Canal Authority titled "Vessel Requirements"...

-sized) vessels transiting the canal
Canal
Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...

 which take more transit time within the locks and navigational channels, and the need for permanent periodical maintenance works due to the aging canal, which forces periodical shutdowns of this waterway
Waterway
A waterway is any navigable body of water. Waterways can include rivers, lakes, seas, oceans, and canals. In order for a waterway to be navigable, it must meet several criteria:...

. On the other hand, demand is growing due to the rapid growth of international trade
International trade
International trade is the exchange of capital, goods, and services across international borders or territories. In most countries, such trade represents a significant share of gross domestic product...

. Also many users require a guarantee of certain level of service. Despite the gains which have been made in efficiency, the Panama Canal Authority (ACP) estimates that the canal will reach its maximum sustainable capacity between 2009 and 2012. The long-term solution for the congestion problems is the expansion of the canal through a third set of locks. Work started in 2007 and will finish by 2014. The third set of locks will allow transit of larger, Post-Panamax ships, which have a greater cargo capacity than the current locks are capable of handling.

Considering the high operational costs of the vessels (containerships have daily operational costs of approximately US$40,000), the long queues that occur during the high season (sometimes up to a seven-day delay), and the high value of some of the cargo transported through the canal, the ACP implemented a congestion pricing scheme to allow a better management of the scarce capacity available and to increase the level of service offered to the shipping companies. The scheme gives users two choices: (1) transit by order of arrival on a first-come first-served basis, as the canal historically has operated; or (2) booked service for a fee—a congestion charge.

The booked service allows two options of fees. The Transit Booking System, available online, allowing customers who do not want to wait in queue to pay an additional 15% over the regular tolls, guaranteeing a specific day for transit and crossing the canal in 18 hours or less. ACP sells 24 of these daily slots up to 365 days in advance. The second choice is high priority transit. Since 2006, ACP has available a 25th slot, sold through the Transit Slot Auction to the highest bidder. The main customers of the Transit Booking System are cruise ship
Cruise ship
A cruise ship or cruise liner is a passenger ship used for pleasure voyages, where the voyage itself and the ship's amenities are part of the experience, as well as the different destinations along the way...

s, containerships, vehicle carriers, and non-containerized cargo vessels.

The highest toll for high priority passage paid through the Transit Slot Auction was US$220,300 charged on a tanker
Tanker (ship)
A tanker is a ship designed to transport liquids in bulk. Major types of tankship include the oil tanker, the chemical tanker, and the liquefied natural gas carrier.-Background:...

, bypassing a 90-ship queue awaiting for the end of maintenance works on the Gatun locks, thus avoiding a 7-day delay. The normal fee would have been just US$13,430. The average regular toll is around US$54,000.

Airports

Many airport
Airport
An airport is a location where aircraft such as fixed-wing aircraft, helicopters, and blimps take off and land. Aircraft may be stored or maintained at an airport...

s are facing extreme congestion, runway
Runway
According to ICAO a runway is a "defined rectangular area on a land aerodrome prepared for the landing and take-off of aircraft." Runways may be a man-made surface or a natural surface .- Orientation and dimensions :Runways are named by a number between 01 and 36, which is generally one tenth...

 capacity being the scarcest resource. Congestion pricing schemes have been proposed to mitigate this problem, including slot auctions, such as with the Panama Canal, but implementation has been piecemeal. The first scheme was started in 1968 when higher landing fees for peak-hour use by aircraft with 25 seats or less at Newark
Newark Liberty International Airport
Newark Liberty International Airport , first named Newark Metropolitan Airport and later Newark International Airport, is an international airport within the city limits of both Newark and Elizabeth, New Jersey, United States...

, Kennedy
John F. Kennedy International Airport
John F. Kennedy International Airport is an international airport located in the borough of Queens in New York City, about southeast of Lower Manhattan. It is the busiest international air passenger gateway to the United States, handling more international traffic than any other airport in North...

, and LaGuardia
LaGuardia Airport
LaGuardia Airport is an airport located in the northern part of Queens County on Long Island in the City of New York. The airport is located on the waterfront of Flushing Bay and Bowery Bay, and borders the neighborhoods of Astoria, Jackson Heights and East Elmhurst. The airport was originally...

 airports in New York City. As a result of the higher charges, general aviation
General aviation
General aviation is one of the two categories of civil aviation. It refers to all flights other than military and scheduled airline and regular cargo flights, both private and commercial. General aviation flights range from gliders and powered parachutes to large, non-scheduled cargo jet flights...

 activity during peak periods decreased by 30%. These fees were applied until deregulation of the industry, but higher fees for general aviation were kept to discourage this type of operations at New York's busiest airports. In 1988 a higher landing fee for smaller aircraft at Boston's Logan Airport
Logan International Airport
General Edward Lawrence Logan International Airport is located in the East Boston neighborhood of Boston, Massachusetts . It covers , has six runways, and employs an estimated 16,000 people. It is the 19th busiest airport in the United States.Boston serves as a focus city for JetBlue Airways...

 was adopted; with much of the general aviation abandoned Logan for secondary airports. In both US cases the pricing scheme was challenged in court. In the case of Boston, the judge ruled in favor of general aviation users due to lack of alternative airports. In the case of New York, the judge dismissed the case because "the fee was a justified means of relieving congestion".

Congestion pricing has also been implemented for scheduled airline services. The British Airports Authority (BAA) has been a pioneer in implementing congestion pricing for all types of commercial aviation
Commercial aviation
Commercial aviation is the part of civil aviation that involves operating aircraft for hire to transport passengers or cargo...

. In 1972 implemented the first peak pricing policy, with surcharges varying depending on the season and time of the day, and by 1976 raised these peak charges. London-Heathrow
London Heathrow Airport
London Heathrow Airport or Heathrow , in the London Borough of Hillingdon, is the busiest airport in the United Kingdom and the third busiest airport in the world in terms of total passenger traffic, handling more international passengers than any other airport around the globe...

 had seven pricing structures between 1976 and 1984. In this case it was the US carriers that went to international arbitration in 1988 and won their case.

In 1991, the Athens Airport charged a 25% higher landing fee for those aircraft arriving between 11:00 and 17:00 during the high tourism season during summer. Hong Kong
Hong Kong
Hong Kong is one of two Special Administrative Regions of the People's Republic of China , the other being Macau. A city-state situated on China's south coast and enclosed by the Pearl River Delta and South China Sea, it is renowned for its expansive skyline and deep natural harbour...

 charges an additional flat fee to the basic weight charge. In 1991–92 peak pricing at London's main airports Heathrow
London Heathrow Airport
London Heathrow Airport or Heathrow , in the London Borough of Hillingdon, is the busiest airport in the United Kingdom and the third busiest airport in the world in terms of total passenger traffic, handling more international passengers than any other airport around the globe...

, Gatwick
London Gatwick Airport
Gatwick Airport is located 3.1 miles north of the centre of Crawley, West Sussex, and south of Central London. Previously known as London Gatwick,In 2010, the name changed from London Gatwick Airport to Gatwick Airport...

 and Stansted
London Stansted Airport
-Cargo:-Statistics:-Infrastructure:-Terminal and satellite buildings:Stansted is the newest passenger airport of all the main London airports. The terminal is an oblong glass building, and is separated in to three areas: Check-in concourse, arrivals and departures...

 was implemented; airlines were charged different landing fees for peak and off-peak operations depending on the weight of aircraft. For example, in the case of a Boeing 757
Boeing 757
The Boeing 757 is a mid-size, narrow-body twin-engine jet airliner manufactured by Boeing Commercial Airplanes. Passenger versions of the twinjet have a capacity of 186 to 289 persons and a maximum range of , depending on variant and cabin configuration...

, the peak landing fee was about 2.5 times higher than the off-peak fee in all three airports. For a Boeing 747
Boeing 747
The Boeing 747 is a wide-body commercial airliner and cargo transport, often referred to by its original nickname, Jumbo Jet, or Queen of the Skies. It is among the world's most recognizable aircraft, and was the first wide-body ever produced...

 the differential was even higher, as the old 747 carries a higher noise charge. Though related to runway congestion, the main objective of these peak charges at the major British airports was to raise revenue for investment.

See also

  • Energy demand management
    Energy demand management
    Energy demand management, also known as demand side management , is the modification of consumer demand for energy through various methods such as financial incentives and education...

     (congestion pricing applied to electric utilities)
  • Pareto efficiency
    Pareto efficiency
    Pareto efficiency, or Pareto optimality, is a concept in economics with applications in engineering and social sciences. The term is named after Vilfredo Pareto, an Italian economist who used the concept in his studies of economic efficiency and income distribution.Given an initial allocation of...

  • Tragedy of the Commons
    Tragedy of the commons
    The tragedy of the commons is a dilemma arising from the situation in which multiple individuals, acting independently and rationally consulting their own self-interest, will ultimately deplete a shared limited resource, even when it is clear that it is not in anyone's long-term interest for this...

  • Transport economics
    Transport economics
    Transport economics is a branch of economics that deals with the allocation of resources within the transport sector and has strong linkages with civil engineering. Transport economics differs from some other branches of economics in that the assumption of a spaceless, instantaneous economy does...

  • Road pricing
    Road pricing
    Road pricing is an economic concept regarding the various direct charges applied for the use of roads. The road charges includes fuel taxes, licence fees, parking taxes, tolls, and congestion charges, including those which may vary by time of day, by the specific road, or by the specific vehicle...

  • GNSS Road Pricing
    GNSS Road Pricing
    GNSS road pricing or GNSS tolling is the charging of road users using Global Navigation Satellite System sensors inside vehicles. Advocates argue that road pricing using GNSS permits a number of policies such as tolling by distance on urban roads and can be used for many other applications in...

  • Congestion Control (Road Vehicles)
    Congestion Control (Road Vehicles)
    Congestion control is a proposed alternative to congestion charging, which is used in a number of cities around the world...


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