Intelligent transport systems are essential if the objective of integrated transport systems in the UK is to be achieved. The historic reasons for the development of congestion in the UK are described. Before road pricing can be introduced, the importance of adequate research and appropriate decision making is stressed. This paper was presented at the Future of Intelligent Transport Systems Conference, Newcastle-upon-Tyne, November 5 1999, and for the covering abstract see ITRD E111197.

Communication of information from the roadway infrastructure to vehicles is expected to enhance Automated Highway Systems (AHS) by supporting subsystem functions like vehicle motion control, multiple vehicle coordination, and vehicle navigation. A suitable communication channel is information coding in the lateral reference used for automatic steering and lane keeping control, e.g. in the magnet reference system used by California PATH (Partners for Advanced Transit and Highways). The presented coding strategy was designed for and tested at the 1–15 test track near San Diego, CA, being prepared for the AHS demonstration of the National AHS Consortium (NAHSC) held in Aug. 1997. A number of aspects are discussed, concerning types and structure of coded information, encoding and decoding schemes, and possible future extensions.

The objective of this paper is to examine the assumption of "uniform market penetration" embedded in the existing evaluation studies of Advanced Traveler Information Systems (ATIS), and to show that this assumption might possibly lead to underestimation of the benefits derived from ATIS. The assumption is then relaxed by endogenising market penetration of ATIS as a function of information benefit using a mixed equilibrium traffic assignment model. It is observed from the numerical experiments that the information benefit and the market penetration of ATIS depend strongly on the trip characteristic such as trip length; ignoring such an important factor may give rise to misleading results of ATIS performance.

Abstract

(1996). EVALUATING THE IMPROVEMENTS IN TRAFFIC OPERATIONS AT A REAL-LIFE TOLL PLAZA WITH ELECTRONIC TOLL COLLECTION. ITS Journal - Intelligent Transportation Systems Journal: Vol. 3, No. 3, pp. 249-252.