The Modelling of Dynamic Route Guidance Systems

In attempting t o simulate the operation of a dynamic route guidance system, the modelling task is concerned both with the operation of the control system and with the implications this has for modelling driver hehaviour (whether or not the driver is receiving information from the controller) and network conditions. The aim of this paper is to provide an overview of the modelling issues which need to be considered when addressing such a problem, and which have been identified by various authors in reports on experimentallsurvey work and in discussion papers. In discussing the great number of challenges t o the modelling world which have arisen from the interest in such systems, we seek t o stimulate further discussion and to provide a framework within which any route guidance model may be critically evaluated. We consider such a framework to be particularly timely in the light of the wealth of simulation models currently being proposed and widely varying conclusions being drawn as a result of many major research initiatives currently underway throughout the developed world. It is our belief that the development of a model which adequately represents the performance of a dynamic route guidance system is of the utmost importance to the success of such an approach. It will not only provide a means for evaluating the potential benefits, but should also provide an essential insight into the most appropriate means for its implementation and improve our understanding of transportation networks. Addresses of authors: Dr David Watling, Institute for Transport Studies, University of Leeds, Leeds LS2 9JT. Dr Tom van Vuren, Frank Graham Consulting Engineers, Elgar House, Shrub Hill, Worcester WFi4 9EN. -