This research aimed to determine the driver and signal factors that are most important in the occurrence of an amber dilemma conflict, by modelling the movement of two opposing vehicles at an intersection. Risk assessment software @RISK was used to allow model parameters to have a distribution of values instead of a fixed value. The scenario most likely to result in an amber dilemma crossing conflict was found to be the following (where Vehicles A and B are in opposing lanes): 1. Vehicle A in dilemma zone; 2. Vehicle B stationary at the limit line in lane furthest from Vehicle A; 3. Vehicle A having a low deceleration rate and large perception-reaction time; 4. Vehicle B having a low perception-reaction time. The results also show how the probability of a crossing conflict decreases significantly as the amber and/or all-red time increases. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E213669.
Samenvatting