An Analysis of the Actual Fluctuation of Drivers’ Route Choice on the Tokyo Metropolitan Expressway Network

Abstract

In this paper, the actual fluctuation of drivers' route choice behavior is analyzed using the data from traffic record collected by the ETC system. Firstly, the relationship between route sharing ratio and travel time of each time zone between junctions are analyzed. The result revealed that the larger travel time difference between two alternative routes is, the larger route sharing ratio of the route with shorter travel time becomes. Furthermore, it was found that if travel time is shorter in one route for most of the time, users are likely to choose it even though the actual travel time is sometimes longer than another route. Secondly we tried to identify the users who do not change their routes based on the change of travel time. It was found that the users who have fixed route choice may have selected the route that is expected to be short in their experience.