圆染色在交通信号灯相位优化设计中的应用

Applications of circular coloring to optimization design of traffic signal light phase

通过引入图论中“最大独立集”、“圆染色”、“圆色数”的概念,将其运用于城市路口交通信号灯最优相位个数的最优相位设计上,并将交通信号灯最优相位归结为其交通流模型图的圆色数.在这篇文章中,根据实际生活中常见四、五交叉路口的各种交通状况,由车流的冲突关系给出交通流模型图并由圆染色的定义及一些已有的结论证明出这些图的圆色数.

The optimization of traffic singnal light phase at city intersection is focused on. The waiting time can be reduced by improving the circle efficiency of traffic light. Circular coloring is proved to be the best tool to solve this problem. The optimization phase amounts of some kinds of crossroads and five-direction crossroads are proposed.