关键词: 交通调查, 车辆出行轨迹, 轨迹拆分, 深度优先搜索, 调查点布设

Abstract: In order to solve mixed track problem in the process of survey and analysis for vehicle track based on plate number, a method of track split is studied by principle analysis, constructing solution set and split decision. A Direct Access Network model（DAN） is established to describe the accessibility relation among survey points, and then the working mechanism based on DAR for track-oriented traffic survey is illustrated. Through the comparative analysis of features of normal track and mixed track, the in-depth priority search algorithm is applied to constructing the solution set of split tracks. According to the correspondence degree between distance and time, matching degree of route patterns and tortuous degree of route, the track utility function is constructed and the optimal decision-making of split track is made using TOPSIS method. An example is given to illustrate the effectiveness of the method.

Key words: traffic survey, vehicle traveling track, track split, depth first search, survey point layout