Optimization For Site Selection Of Mountain Expressway Bus Stop

Socio-economic development in the full range which causes the travel demand of people to fast grows. In order to reduce travel costs, residents in expressway two domains often cross the fence to wait and carjack the bus on the expressway. It affects the normal operation of the expressway and brings great traffic safety hazard. Scientific planning bus stops on the highway are an effective means to alleviate this contradiction. Bus stops built on mountains expressway fact many difficulties, such as the high construction costs, scattered settlements, security management and other characteristics. the location, number, size and other issues of bus stops will directly affect their role to play and economic benefits achieved. Therefore, how to determine the location and reasonable, moderate size, the right number of bus stop on mountains expressway has become an urgent technical problem.Based on a large number of papers relevant information and domestic and foreign research results, take a systematic analysis of bus stops as the starting point, researching the influence area, site optimization, evaluation methods, and other key technologies about plan of bus stops, in order to form the skeleton theoretical system when planning and constructing mountains expressway bus stops.First, the paper systematic analyzes bus stops on mountains expressway, defines the basic concepts of bus stops, resolves the relationship between three elements, and analysis its role, features, functions, composition, etc. According to the different positions, bus stops on mountains expressway are divided into four types, and analyzing advantages and disadvantages, features and layout pattern of different type’s bus stops. Then, according to different types of transportation by which passenger arrival, the influence area of bus stops are divided into direct and indirect influence area. When determining indirectly influence area of bus stops, proposing to use survey about resident trip characteristics, obtaining the different selected travel plan under the effect of different factors, and applying the Logit Model to calibrate parameters of influencing factors. Calculating the traffic selected bus stops from each passenger generating source. The traffic which is to a certain percentage of the total passenger traffic is defined as influence area of the bus stop. The paper takes maximally serving passengers within the affected areas as objective function, takes the minimum service traffic, number of bus stops, construction investment, distance between different bus stops and other factors as constraints, so it can build sitting optimization model of bus stops on mountains expressway. Providing the model algorithm that is genetic algorithms, and analyzing the specific steps and various parameters settled method. Considering the service objective for bus stops passenger, the paper gives principles when evaluation index of bus stops plan is defined. Evaluation index is built it consisted of4first-grade indexes and7second-grade indexes, the paper gives evaluation and calculation process about various indexes, and Proposing evaluation methods and procedures by entropy methods. Finally, the paper takes a mountainous city beltway as the case. Relevant models built in the paper are applied and vivificated to it. The results show that the model is scientific and feasible.