Abstract: According to the nonlinear,uncertain and large scale characteristics of urban road network system,a novel distributed and cooperative control algorithm based on fuzzy neural network is designed.The urban region and the expressway traffic are regarded as a large scale system,and the subsystems are the intersections in the region.Each subsystem has its own fuzzy neural network controller which manages the phase sequence and the time length of green phase dynamically according to its own and its neighbor's traffic situations.The controller consists of three modules:the phase sequencer,the green phase decider and the phase switch.The control objective is to make the expressway unblocked and the average vehicle delay time of networks shortest.Simulation result shows that the control algorithm can deal with all traffic conditions of urban road network in an effective way.