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In Nebraska, a portable speed detection and warning system placed upstream from an I-80 work zone decreased the highest 15 percent of vehicle speeds by about 5 mi/hr as vehicles approached the work zone lane merge area.

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FINDINGSThe SpeedGuard system decreased driving speeds and increased speed uniformity as traffic approached the work zone. At a location 500 feet in advance of the lane closure taper, which was 750…
Content type
Date Posted
05/28/2003

Automated enforcement systems reduced red light violations by 20 to 60 percent, decreased right-angle crashes by 30 percent, and reduced crash injuries by 10 percent.

RESULTS New York City, NY: A number of robotic cameras were installed at 18 intersections equipped with pavement loop detectors. The total cost was 15.5 million dollars over a three year period.…
Content type
Date Posted
05/25/2001