Analysis of driver behaviour at roundabouts in tokyo and the tokyo surroundings

Abstract

The article comments upon results of an analysis of driver behaviour at roundabouts in Tokyo and the Tokyo surroundings. This analysis was conducted as a part of a project entitled “Analysis of the applicability of the author’s method of roundabouts entry capacity calculation developed for the conditions prevailing in Poland to the conditions prevailing at roundabouts in Tokyo (Japan) and in the Tokyo surroundings” financed by the Polish National Agency for Academic Exchange. The article analyses the patterns of behaviour of drivers at roundabout entry legs with regard to the rule of limited confidence in other drivers at the roundabout and the impact of these behaviour patterns on the entry leg’s flow capacity. The results thus obtained show a better match between the models applied for estimating the roundabout entry leg capacity, where one takes into account a certain part of the stream of vehicles leaving the main circulatory roadway using the exit preceding the entry leg analysed, compared to a model where the stream of vehicles leaving the main circulatory roadway has not been included in the composition of the higher rank volume for the given entry leg.