Prediction of the Operating Speed Profile Approaching and Departing Intersections
Publication: Journal of Transportation Engineering
Volume 138, Issue 12
Abstract
The operating speed profile is a useful tool for diagnosing potential safety issues on existing highways and for alignment design. Unfortunately, existing operating speed profile prediction models do not take into account the presence of intersections along roads because a procedure to estimate a reliable operating speed profile on the road section along which driver speed behavior is affected by an intersection is not currently available. To overcome this limitation, driver speed behavior approaching and departing from at-grade intersections and modern roundabouts was studied and a procedure to predict the operating speed profile along a road section characterized by the presence of an intersection was developed. This simple procedure uses the same construction rules as the existing operating speed profile models in order to be easily integrated into them. The procedure developed predicts a reliable profile in the proximity of at-grade intersections and roundabouts along two-lane rural roads, thereby improving significantly the possibility of applying this useful tool to safety evaluations.
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Acknowledgments
The authors wish to thank P.E. Riccardo Pagot for his collaboration in the speed data collection along the major roads.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 138 • Issue 12 • December 2012
Pages: 1476 - 1483
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Mar 23, 2012
Accepted: Jun 13, 2012
Published online: Aug 22, 2012
Published in print: Dec 1, 2012
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