关键词: 拥堵逃离, 累计车辆频数, 出租车GPS数据

Abstract:

In view of the difficulty of finding a taxi during peak hours in large and medium cities, a quantitive method was proposed to study taxis escape from urban congestion areas by using the GPS data of taxis. Firstly, ray method was used for map matching, the road network of central urban was divided into a plurality of research areas, and the taxi GPS data were used to calculate the cumulative vehicle frequency per 5 minutes in each region; Secondly, the cumulative vehicle frequency ratio between different regions was used to describe the flow of the taxis among different regions. The results show that taxis really have the phenomenon of escaping from traffic jams during peak periods, and it is found that the time of taxis fleeing congested areas lags behind 0.5~1.0 h relative to the peak period of social vehicles. The research results have certain reference value for mastering the characteristics of taxi operation and taxi management.

Key words: escaping from congestion, cumulative vehicle frequency, GPS data of taxi