2018 Volume 4 Issue 1 Pages A_229-A_237
In 2016 Government of Japan issued a guideline for physical devises in community areas. In this guideline, the detailed form of humps placed in uninterrupted road sections is shown, however, the shape of humps implemented in intersections, especially its splays, is not described specifically. In this study, the authors focused on a hump placed in an intersection that does not have sidewalks and investigated its shape on a view point of universal design. The authors verified the gradient of splays a hump and implemented a prototype in Saitama University. After the pretest, social experiment was conducted in a residential area in Saitama City. Using a wheel chair, subjects tended to feel difficulty when they passed on a part splay of the hump which gave cross-section gradient more than 2%. The results of traffic surveys revealed that the hump made passing cars slow and it did not produce unacceptable noise and vibration.
