Unsignalized intersections consist of Two-Way Stop-Controlled (TWSC), All-Way Stop-Controlled (AWSC) and uncontrolled intersections which have different priority relationships between traffic movements according to traffic laws. A conflict technique method was utilized to develop capacity models for these three types of unsignalized intersections under mixed traffic conditions involving vehicular, bicycle and pedestrian movements. Using field data collected from several unsignalized intersections, the model parameters were calibrated by a comparison analysis for traffic conditions in China and were modified on the basis of actual traffic conditions. The capacities obtained by the proposed models matched well with the observed capacities and the capacities calculated by conventional methods, which verified the effectiveness of the proposed models. The capacities of vehicular movements at unsignalized intersections with different configurations wereestimated under mixed traffic conditions. In conclusion, the models proved to be valuable tools for determining capacities of vehicular movements at unsignalized intersections.
Abstract