Research on the Structure of Chicanes for Reducing Vehicular Speed

Abstract

The measures of reducing the vehicular speed are the keys to promoting the traffic safety of residential roads. This study focuses on chicanes on residential road that one of the traffic safety measures, and aims to clarify the structure that large sized motor vehicles can fit through and reduce the speed of small sized motor vehicles. In the first place, 3-patterns of structure that have different free view width were set by vehicle shape trace and arranged on the test course. On this course, driving survey and opinion survey were conducted, and analyzed the relation of vehicle speed, free view width, and opinion of the driver. The results showed that if free view width is set under 2 meters then the vehicle speed stays under 30 kilometers per hour. If the free view width is 3 meters then the vehicle speed is not reduced, but it has the effect of promoting careful driving.