Effects of Advanced Demand Signals scheme

This paper proposes the Advanced Demand Signals scheme (ADS) that is a traffic signal control scheme by vehicle demands, and evaluates its performance. Each vehicle in some range transmits the relative distance between the vehicle and the intersection using seamless and real-time road-to-vehicle communications. The traffic signal decides the light according to the demand that is calculated using the transmitted data. Performance evaluations are carried out using the simulator including three intersections with traffic signals. This simulator uses the average idling time as a performance index, and examines the basic performance effect of communication range, and effect of performance function. Consequently, it is shown that the ADS scheme is effective in almost all vehicle densities, and, in particular, the ADS scheme shortens the average idling time more than by a maximum of 90% compared with the most basic conventional control scheme with low vehicle density