交通网络效率的度量和元件重要性的计算方法

针对固定需求和弹性需求的交通网络,综合考虑均衡状态下的出行行为、出行成本、出行需求以及路段流量等因素,分别 提出了网络效率的度量方法,并在此基础上计算网络元件的重要性.算例结果表明:所提出的效率度量方法和元件重要性计算公式是合理的,并对Braess悖论网络进行了分析,发现网络元件的重要性随需求变化而变化.所提出的方法和研究结论对设计和管理交通网络具有指导意义.

Measuring the network efficiency and computing the component importance

The methods for measuring the efficiencies of transportation networks with fixed and elastic demands are proposed,respectively.The measures reflect the influences of travel behavior,travel cost, travel demands and link flows,all in equilibrium state,on network efficiency.Based on the definition of network efficiency,the approach for ranking the importance of the network components is developed. Numerical examples show that the method of measuring network efficiency and the approach for ranking network components are effective.The Braess paradox network with varied demand is analyzed,and the importance of the nodes and links are computed.The proposed methods and conclusions are guide for designing and managing the transportation networks.