Urban Road Network In Motor Vehicle Traffic Capacity Model For The Study And Application

The city traffic jam and congestion are serious. This phenomenon has already become one of the focus problems .Since the 1980s, in order to improving the current situation of city traffic, the researchers of traffic.engineering begin to study the whole way systematically by network, analyze and probe into the macro capacity of whole networks. It makes up the basis of urban traffic planning and management in making policy for city traffic.On the basis of Mason's, the author improves and perfects the model of the capacity of road network of motoring lane of city under the consumption concept of space-time. Propose one a kind of science, practical, reliable calculate model of the capacity of road network in the city. Through traffic survey and analysis, the writer gives the key factor of influencing the capacity of road network. He also studies the total resources of time and space of the road network. Proceed from traffic stream characteristic, has analyzed and probed into the individual exhaustion of time and space in peak-hour traffic. But this model should be perfected continuously. We also should study the key factors that influencing the capacity of road network.The author utilizes Visual Basic 6. 0 and Access, and develops way of city network capacity calculate software system, and this system can get the actual capacities of road networks of motoring lane at different running states. Calculated and offered a procedure of programming technology for the capacity of road network.We know the capacity of the whole city network; Then we can judge the network saturation degree and development potentiality of the network; Can define the key segments and crossings of the road network; Can analyze the supply state of the traffic in depth, offer the previous work for motoring lane road network in supplying and demanding dynamic equilibrium model of the city.The model is used in Kunming City, has been verified the accuracy, practicability, Receive the macro dynamic capacities at different running states of the main urban in this city. Offer the basis for solving and perfect the existing urban traffic problems of Kunming City.