Research On Traffic Technology Of Bus Priority In Signalized Intersection

Bus priority is an important component of the advanced public transportation system in the city intelligent transportation system; and it is one of the effective ways to alleviate the city traffic congestion. The dissertation propose a kind of implementary scheme in which bus inlet lane of road intersection combine with bus priority intelligent signal control system .According to the difference of transitable space in the bus lane system, this article mainly designs and researches on the bus lane of road intersection. On the basis of researching on the design method of bus lane system, this paper has also discussed some important problems of bus lane which include location,road width,design for separation and bus lane. This article stress researching on the design method of zigzag bus inlet lane of bus priority. Through researching on its principle of work, arrangements for factors as well as other essential parameters, a new method of bus inlet lane of bus priority is put forward. Compared with the traditional arrangement of bus inlet lane of road intersection, the improvement and consummation to shortcoming of traditional method and the theory basis for the feasibility and practical benefit of bus lane arrangement are provided.In the signal control system, the bus priority intelligent signal controller adopts the method of the fuzzy control, by considering synthetically flow of public transportation vehicles and social vehicles, to calculate the number of current phase vehicles and successor phase vehicle. Then according to the fuzzy regular base which was established on the basis of practical experience which is based on the command of traffic police and expert's theory research, through carrying on the intelligent decision-making of fuzzy inference system the green light time with current phase and realize the real-time automatic control of green light time is obtained.The paper finally conducte the simulation experiment to this system, through simulating the traffic situation of four phases crisscross road intersection, the paper use separately the timing signal control way and the bus priority intelligent signal control way to carry on the simulation experiment. The experimental result indicated that the bus priority intelligent signal control technology can effectively enhance the travelling capability of bus in the road intersection, reduce passenger's average waiting time and realize public transportation vehicle first pass through in the road intersection, at the same time it can also effectively decrease social vehicles'average waiting time in the road intersection.