Urban Trunk Line Control Optimization And Simulation Studies

Now in most cities in China, traffic jam is an outstanding problem. Intersections have been the bottlenecks of the urban traffic. The average stop delay of vehicle at the main intersections is too long, while it's one of the actual facts that the traffic control mode at these intersections is classified as spot control. The thesis took the arterial street, in Xi'an city, between WuLuKou in JieFang street and the grade separation in YanTa street as its investigation object. Based on an elaborate traffic survey and a meticulous traffic analysis of all the intersections in the arterial street, the author researched the parameter-optimized model of line control.On the point of view of improving the urban traffic control mode, the research managed to decrease the travel delay of vehicle by line control. To work the line control parameters out, the thesis deduced the formula calculating the equivalent traffic volume of intersection, put forward and deduced the elementary saturated traffic volume of intersection, gave the bounds of all the parameters needed for the stop delay of vehicle at the intersection. Taking the influence of turning vehicles and the difference of the importance between two different adjoined segments of the arterial street into account, the thesis established the formula calculating the traffic volume of the arterial street when the offsets of all the intersections are optimized. To visualize the result of the optimized line control of the arterial street, the author of the thesis independently developed the software named Optimization of Line Control of Arterial Streets on the platform of Windows NT Server 4.0 utilizing Visual C++ 6.0 programing language. The software can simulate the vehicle stop delay model, establish the simulating system of the optimization of the line control of arterial streets. The research Optimized the parameters of line control of the arterial street by the software.