一种城市公交网络优化的新方法

A New Approach to Optimizing the Urban Transit Network

本文介绍一种城市公交网络优化的新方法.它包括3个步骤:首先,用拓扑理论对城市公交网络加以精确表达;然后用专家咨询方法得到若干不同的方案,以避开不精确的数学描述;最后用计算机评价软件比较这些方案,经调整得到最优方案.本方法已实际应用于北京市公交网络的调整和优化,并取得了明显的经济效益.

The urban transit network is a sub-system in the city system.How to optimize the existing transit network on the basis of residents distribution,roads and transporta- ti.on epuipment is a most important aspect of researching the urban transit network. The traditional method is to build a mathematical model to quantitate the qualita- tive problem,and to give the optimizing solution which is subjected to the restricted conditions.But usually the result is impractical. This paper introduce a new approach to optimizing the urban transit network.It include three steps:first,using graph theory to express the urban transit network exact- 1y;then,consulting the public transport experts to get several different network struc- tures avoiding inaccurate mathematic describing;finally,comparing these structures with computer program to give the optimized transit network structure.so,the result has the strict theory basis;meanwhile it is practical. we have already applied this method to the Beijing transit network,and improved the economic efficiency.