关键词: 交通工程, 关键度, 节点需求重构, 大规模网络, 影响范围, 交通流重分配

Abstract:

Based on the defined failure scope of the link, its criticality calculation is quantified in terms of vulnerability and importance. The vulnerability is calculated by the probability of link failure under the some failure rules. Link importance evaluation is based on the network reconstruction after the link failure. The local node OD is redistributed on the local reconstructed network within the scope of failure link. Link importance calculation contains two aspects: impact indicator of variation of traveler time cost F(U fa) and traffic load variation indicator of local network F(S fa) . This method conforms to the changed effect of road network after link failure. It effectively avoids a current problem that time-varying OD data is difficult to be obtained. It also solves the singularity problem of choosing existing evaluation indicators. Experiment shows that this algorithm can be effectively applied to link criticality calculation in large-scale road network, and provides the theoretical basis of identifying critical links and evaluation the effect of road closure.

Key words: traffic engineering, criticality, node demand refactoring, large-scale network, influence scope, traffic redistribution