In Colorado, a dynamic truck downhill speed warning system (DSWS) installed on I-70 decreased the number of accidents by 13 percent.

15 December 1997
Eisenhower-Johnson Memorial Tunnel,Colorado,United States

Summary Information

A dynamic truck downhill speed warning system (DSWS) costing $180,000 to $200,000 was installed on I-70 in Colorado in 1993. The system used weigh-in-motion (WIM) sensor information to calculate maximum safe descent speeds for trucks, and then posted this information on a dynamic message sign (DMS) to alert drivers as they approached. After the system was installed there was a 13 percent decrease in the number of accidents and a 24 percent reduction in the use of truck runaway ramps (from 1995 - 1997) in the area.

Benefit Comments

No comments posted to date

Comment on this Benefit

To comment on this summary, fill in the information below and click on submit. An asterisk (*) indicates a required field. Your name and email address, if provided, will not be posted, but are to contact you, if needed to clarify your comments.


IRD Uses WIM Info In Suite of Truck Safety Advisory Systems

Published By: Inside ITS

Source Date: 15 December 1997


Average User Rating

0 ( ratings)

Rate this Benefit

(click stars to rate)

Goal Areas


Typical Deployment Locations

Metropolitan Areas


None defined

Benefit ID: 2000-00055