In Colorado, a down hill truck speed warning system installed on I-70 reduced runaway ramp usage by 24 percent and contributed to a 13 percent drop in crashes involving trucks and excessive speeds.
In Colorado, a down grade warning system integrated a weigh-in-motion (WIM) system with a dynamic message sign (DMS) system to advise drivers of safe descent speeds as they approached a steep negative grade on a mountain freeway (I-70). The system was evaluated and the analysis indicated the system decreased truck use of runaway ramps by 24 percent. In addition, there was a 13 percent drop in accidents involving excessive truck speeds.
Strickland, Rodney R. and Hugh W. McGee. "Evaluation Results of Three Prototype Automatic Truck Rollover Warning Systems." 77th Annual meeting of Transportation Research Board, Washington, DC. January 11-15, 1998.
"IRD Uses WIM Info In Suite of Truck Safety Advisory Systems." Inside ITS. December 15, 1997.
Words of Warning
Author: Taylor, B. and A. Bergan
Published By: ITS: Intelligent Transport Systems
Source Date: May 1997
Other Reference Number: Issue No. 10
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