Benefit

After a ramp rollover warning system was installed at three curved exit ramps on the beltway around Washington, DC, there were no accidents at any of these sites during the three year post deployment test period evaluated.


15 December 1997
Washington,District of Columbia,United States


Summary Information



A ramp roll-over warning system was installed at three curved exit ramps on the beltway around Washington, DC in 1993. On-site sensors and computers detected truck speeds, weight, and height classification, and then calculated the probability a truck would roll over as it approached. If a truck was at risk, a roadside warning sign was activated to alert drivers to slow down.

FINDINGS

At the 3 sites evaluated, historical data indicated there were 6 accidents at the Maryland site from 1985 - 1990, and 2 accidents at each of the Virginia sites from 1986 - 1989. After the system was installed, there were no accidents at any of these sites during the three year post deployment test period evaluated (1993 - 1997).

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Source

IRD Uses WIM Info In Suite of Truck Safety Advisory Systems

Published By: Inside ITS

Source Date: 15 December 1997


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Goal Areas

Safety

Typical Deployment Locations

Metropolitan Areas

Keywords

None defined

Benefit ID: 2007-00433