Study on the Traffic Flow under Keep-Right-Except-to-Pass Rule Based on Dynamic Model

In those countries where driving automobiles on the right is the rule, multi-lane freeways often employ the keep-right-except-to-pass rule. To assess the performance of this rule in terms of traffic flow, safety and posted speed limit, we build a dynamic model for mixed traffic flow. In order to analyze easily and clearly, the road is divided into three kinds of road sections. By solving the dynamic model, we find that this rule can promote the traffic flow in light traffic. The traffic flow and safety index can't be high simultaneously and under-or over-speed limits may restrict the traffic flow.