Urban Traffic Network Signal Optimization

Urban traffic has both direct effect on economy of the city and close relationship with the citizens. For the moment, traffic congestion, economic loss and pollution that are resulted from traffic congestion are big problems which governments around the world are faced with. The researchers and engineers in the field of the traffic engineering are focusing on how to regulate and control the traffic flow properly and scientifically. And optimization for urban road traffic networks is an important branch. On the basis of the model of Singh and Tamura, this paper proposes models of several practical systems, including a complex junction and two networks. Hierarchical algorithms and simulation results are also presents in this paper. We can draw a conclusion that queues can be effectively dissipated in a certain degree by using this optimal control.Air Traffic Management Institute of NPU has being engaged with researches on urban traffic control and ITS for years. And it has achieved lots of productions. A new-type of Traffic Signal Machine named XATM-IV is introduced in this paper and emphasis is put on the hardware and software designs of CAN Bus communication system that is attached to XATM-IV.