主催: Eastern Asia Society for Transportation Studies
p. 385
This study is intended to set forth quantitative criteria on the traffic island, which in turn is designed to improve traffic safety and to facilitate the channelization at intersections. Thereby, it further aims at proposing the standards applicable to intersection designs and to projects to improve their management. Variables affecting construction of a traffic island at the Y-intersection or at the 4-way intersection are traffic volume, existence of the right-turn lane on the border between main and minor roads and the traffic volume over the lane, the difference in the number of lanes between bordering main and minor roads, and type of an intersection. The 3-way and the 4-way intersections do not show much difference. Still, in determining whether to construct a traffic island, the former is affected by the traffic volume over the right-turn lane on the main road, while the latter is more affected by the right-turn traffic volume on the minor road.
