Analysis of long-term changes in the bicycle use by use of the PT survey data

Abstract

During the last half century, the bicycle use environments have undergone significant changes in Japan. In order to examine the development of bicycle use environments based on lifestyle changes, it will be necessary to investigate the relationship between the bicycle use and the socioeconomic changes. Therefore, this research has grasped longterm changes in the bicycle use by using data from the Tokyo Metropolitan Area Person Trip survey conducted five times in the past. Using the analysis method ‘BayesLiNGAM’ and Covariance Structure Analysis, we have revealed the causal relationship between changes in the bicycle use and the socioeconomic changes. As a result, it was shown that the increase in bicycle use by women in their 40s and 60s in the 1980s was understood. Furthermore, the causal relationship that healthy traffic behavior and pottering increased due to the increase of bicycle uses by white-collar workers who mainly work at the office in the 2000s was clarified.