Abstract: Through the morning rush hour traffic survey at the intersection of Guangqiao Road and Zhenyuan Road in Shenzhen, a VISSIM simulation model of the current situation was established, and congestion at signalized intersections were found. From the two aspects of intersection channelization design and signal timing, the improvement plan is proposed, and the three evaluation indicators of the average queuing length, the maximum queuing length and the average delay time of each entrance lane at the intersection before and after the improvement are compared and analyzed using VISSIM simulation. The results show that the improved plan shortens the length of the entrance lane queue, reduces the delay time, and improves the traffic efficiency of the intersection, which proves the rationality and effectiveness of the improved plan.

Key words: Traffic jam; VISSIM simulation; Signalized intersection; Canalization design; Signal timing

摘要： 通过对深圳市光侨路—圳园路交叉口早高峰时段交通调查，建立 VISSIM 现状仿真模 型，发现信号交叉口发生拥堵，从交叉口渠化设计和信号配时两方面提出改善方案，运用 VISSIM 仿真对比分析改善前后交叉口各进口道平均排队长度、最大排队长度和平均延误时间 三项评价指标。结果表明，改善后的方案缩短了进口道排队长度，降低了延误时间，提高了 交叉口通行效率，证明了改善方案的合理性和有效性。

关键词: 交通拥堵；VISSIM 仿真；信号交叉口；渠化设计；信号配时