A Fundamental Study of Cycling on Roadways with Parked Vehicles for Improvement of Bicycle Facilities

Abstract

In Japan, most people had been riding bicycles on sidewalks for around 30 years, therefore the traffic accidents during cycling or walking had been the one of serious problems. Then since 2012, the development of bicycle facilities on roadways especially for bicycle network has started. But there are many parked vehicles and they often break off the continuity of bicycle facilities. They discourage cyclists to ride bicycles on roadways. So in this study, we observed the behavior of bicycles' overtaking vehicles and analyzed the factors of overtaking behavior during cycling. As the result, by video observation, cyclists overtook vehicles in different trajectories between types of bicycles or attributes. Moreover, by cycling simulator experiment, there is a possibility that much kinds of cyclists can overtake vehicles more safely when the bike lanes are developed. And there are unconscious factors of overtaking behavior, so we need to consider not the subjective judgment, but the behavior itself or the surrounding environment.