Abstract: An optimizing method of traffic signal off-line timing based on particle swarm algorithm is proposed.Real-coded plan is used to all phases’ green time of every signalized intersection in traffic network，and different timing plan is correspondent to different particle，and the fitness of a particle is evaluated through total delay time of microscopic traffic simulation，and finally the particle with minimal delay time is the optimal timing plan.Compared with other existing signal off-line timing methods，this paper provides an intelligent optimizing method with simpler coding，less parameters and more fast calculating speed.

Key words: traffic signal off-line timing, particle swarm optimization, microscopic traffic simulation

摘要： 提出了一种基于粒子群的交通信号离线配时优化方法，采用实数编码表示区域内各信号交叉口的各相位绿灯时间，不同的配时方案对应于不同的粒子，粒子的适应度利用微观交通模拟获取的总延迟时间进行评价，最后得到的具有最小延迟时间的粒子即为最优配时方案。与已有的离线配时技术相比，提供了一种编码形式简单、参数较少、计算速度较快的信号配时智能优化方法。

关键词: 交通信号离线配时, 粒子群优化, 微观交通模拟