Construction of an Estimation Method of the Capacity of each Approach at Signalized Intersections which Deals with the Effect of the Right-Turn Traffic

Abstract

The right-turn traffics, which are forced to keep staying at an intersection due to the opposing traffic, usually obstruct the following vehicles' way if there is not enough width on the road. This research focuses on such a phenomenon called ‘the blocking phenomenon’, and construct new capacity estimation methods for several types of signal intersections. The capacities are estimated using the signal control parameter, the right-turn traffic ratio and the saturation degree of the opposing traffic, etc.
In this paper, after estimation methods for three-leg intersection are constructed, the fitness of each method is checked using actual observation data.