Model of Potential Crash Rates of Rural Roundabouts with Geometrical Features
Publication: Journal of Transportation Engineering
Volume 140, Issue 11
Abstract
In recent years, there has been a widespread diffusion of roundabout intersections in the Italian road network; their undoubted popularity is attributable not only to their proven performance in terms of safety but also to their guarantee of smooth traffic flow. However, safety-related requirements of geometric designs are occasionally placed in a subordinate position; therefore, the success achieved by some foreign experiences has not been reached in every area. A model of potential crash rates may indicate how to modify the geometry of intersections to ensure safety. With regard to this, an example model based on the conflict opportunity technique has been developed for estimating crash rates at rural roundabouts. The model appears to respond well to traffic conditions and the geometry of roundabouts. Development of the model and results are described and analyzed in this paper.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 140 • Issue 11 • November 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 21, 2013
Accepted: Apr 23, 2014
Published online: Jul 7, 2014
Published in print: Nov 1, 2014
Discussion open until: Dec 7, 2014
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