Research Of Optimizing Regular Bus Station Which Connected Elevated BRT

With the rapid growth of China’s economic level and the gradual expansion of the scale the city, traffic problems appeared frequently in big cities and even some small and medium-sized cities. In recent years, the strategy of "priority policy of public transit" has achieved initial success, but the intensity of the connection between the public transit modes need to be improved. How to play the advantages of different ways of public transport, and to promote the optimization of diversity in unity of a variety of public transportation, is the key point of the research to achieve low-carbon travel of residents and improve public transport operation efficiency.The bus stops which located at the intersection and linked with elevated BRT often have problems like:the stop accommodates huge numbers of bus lines; the number of transferring passengers is big; the residence time of the buses is long; the queuing time of a bus waiting to sail into the berth of the bus stop is long. In order to improve the above problems, this paper puts forward a method to set an auxiliary stop at the export side of the intersection. The system is insisted of five parts:the elevated BRT bus stop, and 4 auxiliary stops. The method is aimed to reassign part of the bus lines which belong to main stop to one of the auxiliary stops. In order to prove the practicality of the optimization method and to explore how to coordinate the distribution of all the main and sub stations reasonably, the following research is done in this paper.First of all, the research scope is defined through the investigation. The research only focuses on the bus stops which is in the neighbor of the intersection. Aiming to optimize the transferring scheme, this paper describes the characteristics of the buses in different types of bus stops. Besides, it discusses the degree of influence that different types of bus stops may have on the capacity of the intersection and the road section.Secondly, through the questionnaire survey, this paper defines that the transferring behavior at the bus stop internal and the opposite direction has a non-significant influence on the transferring system. The object function of the model is that the walking distance of passengers in the cohesion system becomes shortest, and the queuing time of the buses for stop becomes shortest. The restraint model includes:service intensity of the bus stop, the queuing buses shall not occupy upstream cross, the design capacity of the bus stop.Finally, this paper chooses a bus stop in Chengdu as a case study. On the basis of survey data, the paper makes use of the software Matlab, and along with enumeration method to calculate the Pareto optimal solution. Then, it assigns to the Pareto optimal solutions the weight of each group in order to achieve the best solution under the scale factor. Groups of different proportion of coefficient of all program sensitive degree is analyzed, and difference scheme is proposed for target standard value and sensitive degree of positive correlation between sub-standard target value the greater the gap, it indicates that the scheme is more sensitive to changes in weight.