International Journal of Research and Scientific Innovation (IJRSI) | Volume IV, Issue X, October 2017 | ISSN 2321–2705 

Rotary Feasibility at Akhbarnagar Circle

Hemang Dalwadi, Rahul Pasawala, Shubham Bhandari, Rahul Upadhyay, Pareejat S., Shreyans T.
Department of Civil Engineering, Institute of Technology, Nirma University

Abstract – India’s rapid economic growth has put the country on a progressive mode but it has had its fair share of problems, traffic being one of them. Vehicular traffic on Indian roads have increased substantially over the last decade and the country’s urban road infrastructure needs a much awaited overhaul to address the problems of ever increasing traffic. This paper attempts to address the traffic problem at Akhbharnagar roundabout in the city of Ahmedabad. In this paper feasibility of the rotary has been checked according to IRC clauses and a corrective measure of implementing a traffic signal system has been suggested. Rotary Feasibility

Keywords: Rotary, Feasibility, Four Phase Signal, Circulating Flow, Weaving and Non-Weaving Ratio

I. INTRODUCTION

Rotary intersections or roundabouts are special form of atgrade intersections laid out for the movement of traffic in one direction around a central traffic island. Essentially all the major conflicts at an intersection namely the collision between through and right-turn movements are converted into milder conflicts namely merging and diverging. They then weave out of the rotary to the desired direction.

II. LITERATURE REVIEW

This section will provide a comprehensive review of works related to this topic.

I. [1]“According to the guidelines given by the Indian road congress, rotaries doesn’t seem to be suitable at every location. There are few guidelines that help in deciding the suitability of a rotary.

1. Rotaries are suitable only when the traffic entering from all the four approaches are relatively equal.

2. A total volume of about 3000 vehicles/ hour can be considered as the upper limiting case and a volume of 500 vehicles/ hour is the lower limit.

3. A rotary is beneficial when the proportion of the right-turn traffic is very high; especially when it is more than 30%.

4. It is more suitable when there are more than 4 approaches or if there is no separate lanes available for right-turn traffic. They are ideally suited if the intersection geometry is complex.”

Read More