关键词: 交通网络, 信号控制, 十字路口, 信号周期, 线性规划

Abstract: A traffic network of an urban area is considered in this paper.This paper presents a 0-1 integer linear program which is based on optimization from a purely mathematical point of view to solve the problem of optimizing traffic signal control.In particular，the authors consider a group of signalized intersections in an urban area which have different semaphoric cycles.The phase sequence of each intersection is known but the relationship of these phase sequences between each two intersections is unknown beforehand.The identification of the optimal phase relationship between all intersections and duration for the signal phases are combined into one problem in this paper.It can be used as a benchmark for evaluating the performance of some heuristic algorithms such as the genetic algorithm，fuzzy logic and neural networks.

Key words: traffic network, signal control, signalized intersections, semaphoric cycle, linear programming