Optimising U-turn vehicle movement and signal phasing using VISSIM

Abstract

In the developed countries traffic congestion in the urban area is becoming the part of our daily life, as well as in the most of the developing countries, traditional methodology to manage congestion are not fulfilling the requirement, a new method of capacity analysis at the intersection has been developed in the study where the driver’s behavior, traffic composition, level of road side activities are different from those different countries. Typical cities in the developing countries performed by the heterogeneous traffic mixed including fast-moving vehicle (motorized) and slow moving vehicle (non-motorized).This paper evaluates “optimizing U-turn vehicle movement and signal phasing by simulation method” or low cost “indirect right turn treatment” to reduce conflicts and congestion at the intersection in the urban area. A U-turning vehicle, during merging at an uncontrolled median opening creates the possibility of conflict with approaching through traffic movement and causes traffic congestion which reduces the roadway capacity. The effect of the conflicting traffic volume on the U-turning maneuver was also investigated by collecting placement data extremely congested traffic condition. Compared with the turning movement at the intersection, Volume and travel time studies were conducted at different intersection.