Database system that enables registration and maintenance of customer accounts; facilitates funds transfer between participating Authorities. See also Customer Service Center (CSC).

The amount of data that can be passed along a communications channel in a given period of time.

A toll plaza on a mainline roadway. Typically referring to a toll plaza in a Barrier System but could also be the terminus of an Entry-Exit Ticket System. Barrier plazas require customers to come to a stop or a slow roll-through speed to pay toll or parking charges. Barrier plazas may be used on mainline toll roads, bridges, tunnels, or larger parking facilities such as airports, convention centers, or major attractions and sports venues.

An arrangement of mainline and ramp toll plazas and/or toll zones with discrete toll schedules. Mainline barrier plazas are typically spaced ten to twenty miles apart. Barrier systems can be open (with some free movements allowed) or closed (with no free movements allowed).

Also known as Road-Side Unit and RSU. The roadside infrastructure component of an ETC system; a receiver or transceiver that identifies the On-Board Unit in the vehicle, and identifies the account, permitting an electronic toll transaction to occur.