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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

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Titlesort descending Description

The GALILEO satellite radio navigation system, an initiative launched by the European Union and the European Space Agency, is based on a constellation of 30 satellites and ground stations providing information concerning the positioning of users in many sectors, including transport.


A physical structure, generally located over the toll lanes, used for the location of ETC equipment, signs, etc.


Geographic Information System. A data management system designed to collect analyse and report geographic and demographic information.


Global Navigation Satellite System


Global Positioning System used for positioning and road segment identification. Similar to GALILEO.


The situation on a road where demand exceeds capacity to the extent that traffic is rendered stationary for unacceptable periods.


Global System for Mobile Communications