Optimization Method For Time-Space Resources Of Urban Road Network Considering The Condition Of Public Transport Priority

Bus priority traffic management is a special strategy that reflected in public priorities and people-oriented, and it is also useful to alleviate traffic pressure and ensure sustainable urban development, therefore, it has become the trends of urban transport among various national. Generally, Specific bus priority management measures can be divided into two types: space priority and time priority. Space priority (mainly setting bus lanes, special import channel, etc.) can reduce interference between buses and social vehicles effectivly, and is alos could ensure the priority access of buses; Time priority (mainly bus priority signal control technology) can reduce the loss time of buses through allocating the time resources resonably at intersections, it is one direct and effective bus priority measures. This paper would take the urban road network resource optimization as the research emphas, and it focused on the best bus lane set number of bus priority and the control of the promoter region of the dynamic signal coordination and division of specific control methods.considering bus priority. According to the analisis above, this papers focus on four aspects in the following:1. Factors affecting transit priority strategy analysis and mode selection. This part would Analyze urban public transport strategy for the implementation of priority factors, including the development of the concept of urban transport, urban form and urban function and positioning within the region, and it could determine the main factors affecting the relationship with the bus priority strategies through the actual data; moreover, the model for bus priority development affected by the multi-level type of many other factors, the specific values of the weights could be determined by level of analysis of different factors at different levels, and then, the mode of development of the evaluation public transport can be determined. The results might provide a theoretical basis for bus priority for the different circumstances of the choice of development model.2. Optimal allocation of urban road network space resources under the condition of bus priority.the buses on the bus lanes are affected by the bus stops at the bus stations, the traffic signal at intersections and other factors. The average waiting time at bus stations and average outbound time models were derived based on Birth-death process and gap acceptance theory, and it also determined the influence degree of bus stations on the capacity of bus lanes, with the special characteristics of transit needs and social needs of the vehicle under the bus stops, then the capacity model of bus lanes with the influence of bus stations was proposed.In addition, the road capacities of bus lanes are affected by two factors with the influence of traffic signals: one is the distance of any two continuous intersections; the other one is the spilt at the upper intersection. Based on the traffic data obtained by field survey, the regression model of capacity of bus lanes with the influencing factors, inculding traffic capacity of the basic road, the distance of any two contimuous intersections, and spilts, was determined; aming at the actual bus lines in Hanhzhou, the theoretical analysis of the need to set the number of bus lanes was finished and the overall efficiency of the bus lines was evaluated by VISSIM simulation, and the results shows that the optimal value can effectively improve the overall efficiency of network.3. Control sub-region division method under the condition of bus priority. Control sub-region division is the basis of arterial coordination and regional coordination control. This paper analyzed the influence factors for control sub-region division under the condition of bus priority firstly, and then deduced the the average buses delay model and the relational degree model based on the traditional methods of control sub-zoning, and it also proposed the process of control sub-region division. At last, the inportant influence of the buses service time correlation on the dynamic intersection and into the important impact of the promoter region was presented by simulation.4. Arterial coordination methods under the condition of buses priority. Bus priority signal control is a signal control technology which priority to the interests of public transportation vehicles, and it achieved one special control strategy by optimizing the signal timing which could optimize the allocation the rights of vehicles passage and buses passage at intersections. Moreover, the phase difference is one critical factor in arterial coordination. This paper pointed out the the problems of traditional numerical method and proposed a new improved algorithm. In the following, the influence factors of control sub-region division were analyzed based on the idea of arterial coordination, and then, the average buses delay model and the relational degree model among different routes were determined. At last, the control strategy of arterial cootdination and the timing parameters optimization method was proposed considering the green wave; meanwhile, VISSIM simulation was finished and the results showed that: the bus priority signal control could improve the integrated regional operating efficiency effectively.In the last, the main progress and achievement of this dissertation are summarized, and thecontents and problems which need to perfect and explore further more in the study are putforward.