The Relationship between Saturation Flow and Lane Width of Approach at Signalized Intersections

Abstract

This paper demonstrates that saturation flow rate falls on narrow width lanes (below 3m) at Intersection Approaches. The approaches at signalized intersections in Tokyo, 2.35m to 3.85m of through lane widths, are observed by video cameras, and the data of saturated headway of vehicles in queues discharged at stop line are collected every cycle. In condition that heavy vehicles do not exist in bothone lane and another lane next to it, it can be confirmed that the values of thesaturation flow rate have a trend to decrease according as the width of lane becomes narrower, and heavy vehicles in lane affect the headway of passenger cars in another lane next to it.