Abstract
At the onset of the yellow interval, a driver approaching a signalized intersection has to decide to either stop if he has enough distance or proceed to cross the stop line. A dilemma zone refers to a highly hazardous situation where an abrupt braking may cause a rear-end collision if a driver stops and an angle collision may occur if he crosses the intersection. To prevent drivers from being caught in the dilemma zone, actuated signal control has been introduced. There is an important issue in controlling the signals for this purpose. It is a model of driver/vehicle behavior involving the reaction time of braking and the deceleration rate of a vehicle. This paper studies the stopping behavior of a driver. We extract the model parameters using a driving simulator, which can simulate a dilemma zone. It is confirmed that the driver's decision in a dilemma zone is influenced by the vehicle's distance to the stop line, the approach speed and the indication of pedestrian signal.
