Modelling the impacts of transport telematics: current limitations and future developments
Pressure on transport networks from increased demand to travel combined with reducing investment in highway infrastructure is leading to significant interest in the use of transport telematics. Telematics systems are aimed at making the most of existing infrastructure through, for example, area traffic control, electronic tolling and traveller information. Although there are quite high levels of activity in the application and implementation of some systems, there remains a significant dearth of evidence of the impact these systems will have on behaviour and travel patterns. It is important that appropriate appraisal methodologies are available to assess the impact of new systems. Modelling is an appropriate method of appraisal as it enables system-wide impacts of individual responses to be predicted. This paper is concerned with the advances required in order that modelling techniques are available for this purpose. Modelling requirements are identified from reviews of technologies, behavioural responses and modelling procedures. Advice is given on both enhancements to existing modelling procedures and the structure of a modelling system that fully meets assessment needs. Recommendations are made on steps to be taken towards this.
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