The Traffic Situations for Humps in Different Length of Flat Part

Abstract

Installation of traffic calming devices is effective as a traffic safety measure on residential roads. In “Technical standards for installing Humps, Narrowings and Chicanes”, the standard shape of hump that is effective for vehicle speed control was shown. On the other hand, there are various road structures and roadside environments of residential roads, it is necessary to have knowledge on various shapes of devices and installation methods that can be adapted to each road. Therefore, in this study, focusing on vehicular speed can be reduced even humps with flat part length assuming installation at the intersection etc, a traffic experiment was conducted with a plurality of humps with different flat part lengths, and the vehicle speed control effect and vehicle behavior differences of the humps with different flat part lengths were confirmed. In addition, a questionnaire survey was conducted to understand driver awareness during hump traffic, investigate the difficulty of speeding up to high speeds, the difficulty of driving and expected effects when installing each hump on actual roads.