Impact of Dynamic Message Signs on Speeds Observed on a Rural Interstate
Publication: Journal of Transportation Engineering
Volume 140, Issue 6
Abstract
Dynamic message signs (DMSs) are a component of intelligent transportation systems (ITSs) used to convey real-time travel information to motorists, enabling them to make better decisions in response to real-time roadway conditions such as congestion, crashes, and adverse weather. The purpose of this paper is to analyze the existing DMS system implemented by the Wyoming Department of Transportation (WYDOT) along a rural segment of Interstate 80 in southeastern Wyoming between the cities of Laramie and Cheyenne. The research uses speed, weather, and DMS message data collected from the winter season of 2009 to 2010 along the corridor to determine how driver speed behavior is affected by DMS signs. A linear regression model utilizing four different weather severity categories was estimated and the results indicate that the DMS message signs are effective at reducing drivers’ speeds along rural interstate corridors from 8 km/h to 32 km/h (5 mi/h to 20 mi/h) above the speed reductions that can be accounted for by weather conditions alone.
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Acknowledgments
This work was funded by the Mountain-Plains Consortium and was made possible through the cooperation of the Wyoming Department of Transportation.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 140 • Issue 6 • June 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 5, 2013
Accepted: Jan 20, 2014
Published online: Mar 26, 2014
Published in print: Jun 1, 2014
Discussion open until: Aug 26, 2014
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