Research for expediting the dissemination of Japanese-style roundabouts
Background and Objectives
Currently, there are more than 160 roundabouts in Japan; however, roundabouts in Japan remain scarce compared to those in other developed nations. The purpose of this project is to identify uniquely Japanese specifications and installation methods that satisfy the criteria emphasized in Japan (compactness, low cost, simplicity of design, accommodating diverse users, consent forming, etc.) and how these differ from those in other countries, and thereafter, to proactively communicate the findings to expedite the dissemination of roundabouts in Japan.
During the year ended March 2024, we collaborated with the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) to conduct national, prefectural, and municipal surveys regarding the demand for roundabouts. A total of 1,610 organizations responded to the survey. Based on the findings, we will collaborate, during the year ending March 2025, with the MLIT, the National Police Agency, municipal governments, and other public bodies to install Japanese-style roundabouts at real-world intersections and organize seminars to encourage the dissemination of such roundabouts.
Expected Results
Foresightfulness: Japanese-style roundabouts will be designed based on the demand for removing traffic lights and facilitating automated driving at intersections.
Practicality: The project will identify specifications and installation methods for low-cost Japanese-style roundabouts, expediting rollout.
Novelty: The project will present uniquely Japanese specifications for roundabouts and show how they differ from roundabout specifications applied in other countries.