Analysis of Rotary Intersection at Vadodara (India)

Author(s):

Shaikh Vasim Abdulsalim , FACULTY OF ENGINEERING AND TECHNOLOGY, PARUL UNIVERSITY; Khushbu Bhatt, PARUL INSTITUTE OF ENGINEERING AND TECHNOLOGY; Siddharth Gupte, PARUL INSTITUTE OF ENGINEERING AND TECHNOLOGY

Keywords:

Traffic, Rotary Intersection, Analysis, Capacity, Volume, Delay

Abstract:

Increasing trends of traffic in urban area is a major concern in all the cities in India. The heterogeneous traffic are more diverse in nature due to lane changing and lack of lane discipline characteristics of driver’s in India. The rotary intersections are of the most vital components of urban roadway network. Intersection is one when either three or more road meets or intersects each other. It has been observed that the entry capacity of vehicles become comparatively lower at intersection than that of the straight portion of the road due to reduction in speed. Hence, long queues on intersections often observed, causing huge fuel consumption as well as environmental pollution in the urban area beside considerable time loss. The situation become more intense during the peak hours when increase of traffic volume by 50% than normal traffic. The traffic flow characteristics at rotary intersections are study to observe the performance of intersection. The capacity of the roadway rotary depends on the flow at different legs approaching the rotary. The present traffic scenario is usually used to characterize the present traffic condition to access the different parameters at different types of intersection. In the vicinity of a rotary intersection, road users must co-adjust their performance by reduced speed or change of path to avoid collision with each other. The purpose of the rotary intersection design is primarily to reduce the zone of conflicts within the intersection the main objects of providing a rotary are to eliminate the necessity of stopping even for crossing streams of vehicles and to reduce conflict. The crossing of vehicles is avoided by allowing all vehicles to merge into the streams around the rotary and then to diverge out to the desired radiating road. Thus the crossing conflict is eliminated and converted into weaving maneuver or a merging operation from the right and diverging operation to the left. Researchers have worked on the estimation of the capacity of a rotary intersections using different approaches. Four rotary intersections are taken up for capacity analysis. The capacity studies on these four intersection was calculated based on the established norms of Indian road congress ( IRC: 65, 1976 ).Rotary intersections are studied based on weaving traffic and entry volume. These parameters are function of traffic volume and geometric features. These parameters are critically observed in respect of distance from CBD boundary. The performance analysis of rotaries are based on various parameters such as total entry traffic volume, weaving traffic, capacity of weaving section and distances from CBD boundary. The resulting performance leads to a new modal development and its validation.

Other Details:

Manuscript Id	:	IJSTEV3I8058
Published in	:	Volume : 3, Issue : 8
Publication Date	:	01/03/2017
Page(s)	:	198-202

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