A relevant theory and method of model to calculate the capacity of short-linked grouped intersections is proposed in this paper.

A study is made of the coordination design method of left turn movements for intersections group which is composed of high loaded intersections and light loaded intersections.

For the intersections group coordination control,this paper establishes the offset optimi- zation model,which minimizes the total control delay in the intersections,group simultaneously.

Fuzzy logic control and simulation of urban traffic intersections group;

Signal control strategies for related grouped intersections based on Particle Swarm Optimization was proposed.