异常事 件下高速道路交通状态的分析与仿真.PDFVIP

第8 卷　第2 期 交 通 运 输 工 程 学 报 Vol.8　No.2 2008 年4 月 Journal of Traffic and Transportation Engineering Apr.2008 :1671-1637(2008)02-0116-06 1 2 3 张海军,张　珏 ,杨晓光 (1., 　200092;2., 　200040;3. , 　200092) 　:为了考察异常事件对高速 路交通运行的影响, 对事发后高速 路局部交通状态的演变过 程进行了分解, 分析了各阶段的事发点通行能力, 并将事发点通行能力的影响因素归纳为事件性 质、阻塞行车 宽度、事件发生位置、现场行车秩序与上游交通量等五类,针对交通事故引起局部车 临时关闭这一典型的异常事件, 进行微观交通仿真。仿真结果表明:行车延误随着车 关闭开始 大幅度增长,直至车 开放, 之后开始降低, 整 个演变过程伴随着波动;当交通量接近于 路通行能 力时,交通流系统处于脆弱的平衡状态, 异常事件极易引起大范围、长时间的交通拥堵, 此时,应采 取交通诱导和匝 控制等必要的措施来转移部分交通量, 减小异常事件的影响。 :高速 路;通行能力;异常事件;交通仿真 :491.114　　　:A Analysis and simulation of traff ic state on expressway during incident 1 2 3 Zhang Hai-jun , Zhang Jue , Yang Xiao-guang (1.Shanghai Municipal Engineering Design General Institute, Shanghai 200092, China; 2.Shanghai City Comprehensive T ransportation Planning Institute, Shanghai 200040, China; 3.School of T raffic and T ransportation Engineering, Tongji niversity, Shanghai 200092, China) Abstract :In order to research the influence of incident on the traffic operation of expressway, the process of local traffic state during incident was disassembled, the capacity in each phase was analyzed, the affecting factors of the capacity were induced to incident feature, blocked width, incident position, travelling order and upstream trafficvolume, and traffic microsimulation was carried out when accident results to the closure of some lanes.Simulation result shows that traffic delay increases quickly during the closure till the lanes are opened, then starts to decrease, there are some fluctuations in the whole process;when traff