Capacity of Roundabout, Performance & Analysis - A Review

This paper addressed the various capacity model and analysis of roundabouts. Specially in India the performance and geometry of roundabouts is unstable due to the huge amount of traffic influx. While comparing the various capacity model based on Gap-acceptance theory, and define the LOS and layout of the roundabouts the modified Tanner capacity formula can be used while calculating Roundabouts capacity because it is based on the both gap- acceptance theory and geometric of roundabouts. Analysis & Design of junction capacity of roundabout swept path analysis is more important. Key Words: Roundabout, Swept Path Analysis, LOS, Gap- acceptance, Headway, Capacity