The aim of this study is to try to explain the reason why drivers moving on wider roadways feel as if they are moving more slowly than those on narrower roads. The authors developed the 'Dynamic Scenery Picture Proposing and Controlling System', which is able to measure driving behavior under controlled conditions with Three-Dimensional Computer Graphics (3D-CG) animation image in a laboratory. Using the system, experiments for identifying drivers' perceptions of speed using a pair of dynamic sceneries and different road geometry and vehicle speeds are carried out. The 'matching method' developed in the field of traffic psychology is utilized for this identification analysis. The results derived from the experiments are examined by the two variables formularized by the authors. The variables are the angular velocity of moving visual stimuli from the viewpoint of driver's eyes and the frequency of visual stimuli. Through this analysis, the effects of some countermeasures installed in Japan which aim to reduce vehicle speeds with roadway markings or side wall paintings are examined. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E213531.
Abstract