基于均衡原理的单向交通瓶颈路段诊断法

以单向交通组织区域边界的道路节点为OD点,把交叉口转向流线虚拟成路段,转向车道的通行能力作为虚拟路段的容量,转向车道的行程延误作为虚拟路段的交通阻抗,与实际的路段一起组成单向交通组织区域节点OD之间的路径,采用集合运算合成节点OD之间的通道容量。利用交通均衡方法,经交通分配得到单向交通组织区域的路段和虚拟路段的交通量。通过计算饱和度判断路段和交叉口的拥挤程度,诊断出交通瓶颈,为单向交通组织方案的完善提供可靠的支持。

Diagnosis of One-way Traffic Bottleneck Road Section Based on Traffic Equilibrium

Taken the road nodes which located on one-way traffic organization region boundary as the OD(origindestination)nodes,each direction lane of intersection was changed as virtual road,turning lane capacity as the virtual road link capacity,and travel delay on the direction lane as virtual section impedance together with the situation of the actual road section to synthesize the OD route capacity which Was obtained through set operation.The link flow in one-way traffic organization region and that of virtual road link were obtained by use of traffic equilibrium method.Through computing the saturation degree of each link and intersection,the congestion degree of the wad and intersection was judged,the traffic bottleneck was diagnosed to improve one-way traffic plan.