Compared with road network reconstruction,signal timing has become an important means to solve traffic jam,and it can save cost,improve traffic efficiency and better play the role of traffic signals.Based on Vissim simulation software,this paper takes the intersection of tianhe north road and sports west road in tianhe district of guangzhou as an example to evaluate the signal timing optimization.The simulation results show that the average vehicle delay at optimized intersection decreases to 21.29 s,decreases by 22.3％.Parking time decreases by 24.2％,and the average queue length and average parking time also improve significantly.%相对于路网改造,交叉口的信号配时已成为解决交通拥堵的重要手段,它可以节省成本,提高通行效率,更好地发挥交通信号的作用.文中基于Vissim仿真软件,以广州市天河区天河北路和体育西路的交叉口为例,对信号配时优化前后进行评价.仿真结果表明,优化后交叉口车均延误降低到了21.29 s,降低了22.3％;停车时间降低了24.2％,平均排队长度和车均停车时间也有明显的改善.
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