Modification of Roundabout to Avoid Interlocking During Heavy Traffic Condition: A Case Study

Author(s):

Rahul Sharma , Intercontinental Consultant and Technocrates Pvt Ltd

Keywords:

Roundabout; Capacity; Signal; weaving section; Proportion Value

Abstract:

A roundabout intersection is a specialized form at grade intersection laid out for movement in one direction around a central island. Since most of the roundabouts are situated in urban CBD areas, the intersection region could not be expanded to deal with increasing traffic. The objective of the study was to estimate the capacity of roundabout and compare it with present traffic. The video data was collected for 5 hours to observe the traffic behavior of vehicles at selected roundabout. The volume count was performed by observing four different class of vehicles namely Cars (small as well as large), motorized 2-wheelers and 3- wheelers as well as Heavy vehicles (buses and trucks). The capacity was estimated using Wardrop’s formula by calculating weaving traffic proportion (p) for each weaving section. For maximum weaving traffic proportion, the capacity was estimated as 3163 pcu/hr which is very less compared to total volume present during peak hour i.e. 17341pcu/hr. Hence, converting the roundabout into signalized roundabout intersection is proposed which requires proper designing of traffic signals. At final stage, the designed signals would be implemented to avoid roundabout interlocking in future.

Other Details:

Manuscript Id	:	IJSTEV6I9012
Published in	:	Volume : 6, Issue : 9
Publication Date	:	01/04/2020
Page(s)	:	22-26

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