考虑区域交通信号配时优化的公交专用道线网规划

在公交专用道线网实际规划时，需要综合考虑交叉口延误与信号配时等因素的影响。为了使公交专用道线网规划更加合理，在考虑区域信号配时优化的条件下，以绿信比作为各个交叉口的信号配时优化变量，建立了双层规划模型，上层模型的目标函数是使网络的总出行时间最小，下层模型由交通方式划分模型、小汽车客流分配模型和公交客流分配模型3部分组成，并采用遗传算法对模型进行了求解，通过算例验证了模型的有效性。结果表明：在进行公交专用道线网规划时，交叉口的延误不可忽略；在考虑交叉口延误的基础上，对区域信号配时优化可进一步降低网络的出行总成本。

Bus lane network planning considering regional traffic signaltiming optimization

In the actual planning of a bus lane network, the influence of intersection delay and signal timing should be considered. To make the planning of bus lane networks more reasonable, considering the optimization of regional signal timing,using the green signal ratio as the optimization variable of signal timing at each intersection, a two-level planning model is established. The objective function of the upper model in this two level planning model is to minimize the total travel time in the network. The lower model comprises three components: the traffic mode categorization model, car passenger flow assignment model, and bus passenger flow assignment model. A genetic algorithm is used to solve the model, and the effectiveness of the model is verified by a computational example. The results show that in the planning of a bus lane network, the intersection delay cannot be ignored; by considering the intersection delay, the optimization of regional signal timing can further reduce the total travel cost of the network.