Safety and Operational Analysis of At Grade Unsignalized Intersections

Abstract

Intersections in our country are seldom designed according to standards which results in traffic congestion and accidents. The best way to control an intersection is to control it without traffic signals. An intersection should guide the road user through it, with appropriate signings and geometry. Thus, it is important to carry out a road safety audit of uncontrolled intersections in the light of design standards and identify the shortcomings.An intersection needs to be analyzed in terms of intersection sight distance and other necessary measures such as crosswalks and stop line etc. an alternate to an intersection is a roundabout. A roundabout allows the traffic to flow smoothly through the intersection with the help of deflections in geometry and signage. Thus, well planned, sensible and efficient intersection designs are needed. Our study aims to identify intersection design problems in two simple intersections and two roundabouts. All of them are in Risalpur. For the analysis and redesign,the standards of FHWA and AutoCAD Civil 3D (Vehicle Tracking)Software was used.