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Glossary of Terms

IBTTA’s transportation Glossary of Terms is an ever-changing list of terms used within the transportation and tolling industry. The Glossary was updated in August 2018.  If you have suggestions for future additions, please contact us.


  Glossary of Terms

The Council of Platinum Sponsors (CoPS) TollMiner & Glossary Working Group was created to improve definitions of toll facility concepts that are used in the IBTTA TollMiner Data Visualization tool. Since the TollMiner data and structure are closely linked to the IBTTA Glossary, a review and draft update of the glossary was performed during 2021.


Review the First Draft »

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Titlesort descending Description

Concerted Action for Research and Demand Management in Europe . A European Commission project on ETC interoperability that involves national administrations.


Closed Circuit Television


Code Division Multiple Access, a cellular technology. See also: Global System for Mobile Communications (GSM).


Comité Européen de Normalisation: is the European Committee for Standardization.

CEN 278

CEN TC278 is the Technical Committee #278 responsible for Road Transport and Traffic Telematics, whose Working Group 9 has agreed upon the norms for ETC based upon DSRC 5.8 GHz.


Comité Européen de Normalisation Electrotecnique: is the European Committee for Electrotechnical Standardization

Certificate Authority

A Certificate Authority (CA) is an organization that issues and manages security credentials and Keys for message encryption and decryption. As part of Public Key Infrastructure (PKI), the CA provides certificates (Keys) to Issuers. The Keys are used to encrypt, sign and secure Electronic Payment Services (EPS) transactions.


Common EFC System for an ASECAP Road tolling European system. CESARE is a project set up by ASECAP and partially funded by the European Union with the intention of specifying, designing, developing, promoting and implementing a common interoperable Electronic Fee Collection System (EFC) on European toll roads.


To determine the category of the vehicle to be tolled based upon its specific structure, weight, axles, tires, etc.

Clearinghouse (Financial)

A Clearinghouse Network routes transactions for reconciliation. The term applies to all types of financial transactions, not just toll transactions. Examples of Clearinghouses (or Clearinghouse Networks) include the Federal Reserve Automated Clearinghouse Network (ACH), VISA, MasterCard, American Express, Pulse & Cirrus. It is important to note the distinction between a Clearinghouse and a Fiduciary (defined below): A Fiduciary converts transactions into Funds, a Clearinghouse routes transactions to Fiduciaries.

Clearinghouse (Toll Authorities)

Provides all requisite financial services to transfer monies between participating Authorities; provides accurate and timely downloads of customer accounts, violations and all other information necessary for an interoperable system.

Closed Barrier System

A facility that has both mainline toll barriers as well as ramp toll plazas, placed such that no toll-free traffic movement is permitted.  (examples:  the Sam Houston Tollway, E-470)

Closed System

A system that monitors your entrance and exit and calculates the toll on the basis of distance traveled.

Closed Toll Section

Section of a toll road where an entry ticket is needed and where the amount of the toll to be paid is subject to the distance traveled.


A grant of a tract of land made by a government or other controlling authority in return for stipulated services or a promise that the land will be used for a specific purpose. In some cases this will mean the exclusive right to market some product like fuel or food on a turnpike. In the U.S. it may relate to leased space in a rest area. In some instances, both inside and outside the U.S. the concession is the tolled facility itself and a private company operates the facility for a profit under agreed upon guidelines or payments.

Concessionaire Company

Mainly in Europe: A company which is awarded, by a concessioning Administration, the operation of a toll facility. Usually the contract includes the design, construction, financing and operation of the facility.

Congestion Pricing

Congestion Pricing (also called Value Pricing) refers to variable road pricing (higher prices under congested conditions and lower prices at less congested times and locations) intended to reduce peak-period vehicle trips. Tolls can vary based on a fixed schedule, or they can be dynamic, meaning that rates change depending on the level of congestion that exists at a particular time. It can be implemented when road tolls are implemented to raise revenue, or on existing roadways as a demand management strategy to avoid the need to add capacity. Some highways have a combination of un-priced lanes and Value Priced lanes, allowing motorists to choose between driving in congestion and paying a toll for an un-congested trip. This is a type of Responsive Pricing, meaning that it is intended to change consumption patterns (Vickrey, 1994).

Connected Vehicle

Connected Vehicle Program - The U.S. DOT Research and Innovative Technology Administration (RITA) \ ITS Joint Program Joint Program Office (ITS JPO) is the major sponsor of the Connected Vehicle program. Connected Vehicle focuses on localized Vehicle-to-Vehicle, Vehicle-to-Infrastructure and Vehicle-to-Device Systems (V2X) to support safety, mobility and environmental applications using vehicle Dedicated Short Range Communications (DSRC)\Wireless Access for Vehicular Environments (WAVE).  This program has support from most of the automakers and a number of state departments of transportation.

Contract Issuer

Organization that issues contracts and which is responsible for payment to the Transport Service Provider (TSP) on behalf of the customers.

Contributo (Contribution)

Tribute levied on certain private subjects, justified by the fact that these subjects benefit from the results of a given public activity. It shares the characteristics of both tax (tassa)--being the consideration for a service, and tax (imposta)--to be paid even if the subjects have not requested the service.

Cordon (Area) Tolls

Cordon tolls are fees paid by motorists to drive in a particular area, usually a city center. Some cordon tolls only apply during peak periods, such as weekdays. This can be done by simply requiring vehicles driven within the area to display a pass, or by tolling at each entrance to the area.

Cross-lane read

A phenomenon where the signal from a transponder is picked up by the reader or Roadside Unit (RSU) in a toll lane other than the queue the vehicle is traveling in. This can result in toll being applied to the wrong vehicle, double charges or lost transactions.


Customer Service Center - A facility used to service customers.


California Toll Operators Committee - A collaborative organization of California's toll facility operators/owners, primarily concerned with developing protocols and resolving issues related to ETC interoperability.