AUTOMATIC DEBITING AND ELECTRONIC PAYMENT FOR TRANSPORT - THE ADEPT PROJECT: 3. CONGESTION METERING: THE CAMBRIDGE TRIAL

Abstract

This paper is the third of a series of five on a field trial of the ADEPT equipment to demonstrate congestion metering, hosted by Cambridgeshire County Council, England in October 1993. The following aspects of the field trial are described: (1) the principle of congestion metering; (2) the design of the required hardware and software; (3) the system's demonstration in Cambridge; (4) its technical and behavioural evaluations. Congestion metering aims to charge drivers the true marginal costs of travel using their vehicles. The trial aimed to demonstrate the technical feasibility of congestion metering, but its equipment can also demonstrate other forms of charging. It includes: (1) in-vehicle equipment, including communications transponder, keyboard, display and smartcard reader; (2) a road-side system, using a microwave communications beacon; (3) enforcement subsystem; (4) card service station. The following charging algorithms were implemented and tested: (1) congestion metering; (2) distance charging; (3) open tolling. The experiment in Cambridge, using an entry beacon and an exit beacon on one main road, is described. It aimed to show what the equipment would look like and what it could and could not do. Complementary attitude and behaviour surveys were administered in Cambridge during Autumn 1993.

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