通过容许流量期望值的评估 ,预测了未来震后交通系统通行能力 ,从未来震后交通系统流量分析入手 ,利用最大流最小割定理 ,寻找震后瓶颈路段 ,通过对反映各单元改善对系统交通能力的影响的各种重要度的讨论 ,确定优先加固或扩建单元。以未来震后交通通行能力最大为优化目标 ,建立加固或扩建的优化模型 ,通过对各种初选方案进行组合优化 ,确定最优加固或扩建单元改善程度 By predicting the expected value of flow, the traffic capacity of the future post-earthquake traffic system is predicted. Traffic flow analysis of the future earthquakes will be used to start the traffic flow analysis. The maximum flow minimum cut theorem will be used to find the bottleneck section after the earthquake. The discussion of the importance of various influences identified the priority reinforcement or expansion unit. In order to optimize the traffic capacity after the earthquake in the future, an optimization model of reinforcement or expansion is established. Through optimization and combination of various primary options, the improvement of the optimal reinforcement or expansion unit is determined