基于BRT吸引圈层的公交线网优化重构方法——以常州市为例

Transit Network Optimization Method Based on BRT Attracting Region——A Case Study of Changzhou

现阶段公交网络布局及优化研究,大多偏重单条线路调整而缺乏对线网整体协调性的考虑,或理论性过强而可操作性不足.针对此类问题,依托常州市公交线网优化方案研究,提出了"网络节点重构,线路优化配合"的公交线网优化重构方法.在对BRT吸引圈层内的公交线路进行优化必要性判断的基础上,根据常规公交线路与BRT线路的位置关系及功能定位对常规公交线路进行分类,通过优化方法选择集提取线路优化方案.提出了关键节点的概念,搜索节点期望线重构网络,判断筛选方案,生成线路优化方案选择集.最后,根据总体优化目标函数进行方案比选,求解最优解,得到最终优化方案.经过常州市新建BRT二号线检验,优化效果明显,证明了该方法的可行性和有效性.

There are two solutions in common transit network optimization（TNO） research.If only adjusting routes,the network may lack integration.Otherwise,network adjusting would reduce the operability.To avoid the disadvantages,a TNO method based on TNO research of Changzhou was proposed.Firstly,bus routes in BRT attracting region were found,and classified according to their position relationship and function split.Then optimization schemes of each route were generated from the set of optimization methods.Secondly,the concept of key node was using for the first time.Network was rebuilt by expectation line search.Sets of optimization schemes were established after schemes were screened.Lastly,schemes comparison was taken according to the optimization objective function,and the optimum solution was searched to obtain the final optimization scheme.The method was examined by BRT No.2 of Changzhou with obvious advantages for passenger flow volume,which proved the method is feasible and reliable.