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分析了城市内部各向车流冲突造成的车辆延误对疏散与救援决策的影响,将交叉口控制参数引入到现有的基于元胞传输模型的应急疏散救援仿真模型中,建立灾时交叉口紧急控制下的应急疏散救援仿真模型。改进后的模型以规划周期内疏散与救援加权行程时间最小为目标,并引入反流策略。仿真结果表明:由于低优先级的车流G1和G2让行高优先级车流G3和G4而产生延误,其平均行程时间分别增加了10.0、11.1 s,符合城市内部疏散与救援的实际情况;反流策略实施后,受益的车流G2和G4行程时间分别下降了6.5、6.0 s。可见,提出的模型及反流策略有效。
The impact of vehicle delay on evacuation and rescue decisions caused by vehicle traffic conflicts in different cities was analyzed. The control parameters of intersection were introduced into the existing emergency evacuation and rescue simulation model based on cellular transmission model. Emergency control Under the emergency evacuation and rescue simulation model. The improved model aims at minimizing the evacuation and rescue-weighted travel time during the planning cycle and introducing a countercurrent strategy. The simulation results show that the average travel time increases by 10.0 and 11.1 s, respectively, due to the delay of high-priority traffic flow G3 and G4 due to low-priority traffic flows G1 and G2, which is consistent with the actual situation of urban evacuation and rescue; After the implementation of the strategy, the beneficiary traffic flow of G2 and G4 decreased by 6.5 and 6.0 s respectively. Obviously, the proposed model and the counter-current strategy are effective.