K. Chatterjee

Determinants of travel demand--exploring the future of society and lifestyles in the UK

This paper considers how changes in the fabric of society and its values, a subject usually considered to be outside the conventional scope of the transport profession, can have a profound impact on travel demand. The paper stems from the Transport Visions Network, a unique activity involving young professionals from academia, consultancy and government. It raises awareness of the diversity of factors that influence travel and transport. The paper offers an overview of existing trends and projections for the future before presenting a series of different future scenarios. Suggestions on the consequences for transport are then put forward.

THE NETWORK SAFETY EFFECTS OF DYNAMIC ROUTE GUIDANCE

Abstract Driver information systems help drivers to navigate efficiently through a road network and avoid congestion. However, while a driver could save time by complying with a route switch recommendation, they might experience an increase in accident risk or cause other drivers to experience an increased risk. If this is the case, it may be worth considering the accident risk of different routes as part of the route recommendation process. The integration of accident predictive models within a traffic network model, designed to simulate route guidance, enabled these issues to be investigated Dynamic route guidance, based on a minimum journey time criterion, is estimated in a congested, urban network to result in accident reductions of a similar proportion to distance reductions, but significantly less than journey time reductions. The effect of considering accident risk in route recommendations was investigated. Deterring drivers from minor roads or from high risk junction crossings failed to produce si...

How ramp metering system impacts merging traffics

This paper reports a case study of a ramp metering system (using ALINEA control strategy) in the southeast of the UK. The specific feature of this study is that it investigated the impact of ramp metering on the detailed driving behaviour of motorists. The results reported in this paper focus on the impacts of ramp metering on the merging vehicles from slip road.