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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation
FHWA Highway Safety Programs

Safety

Roadway departures account for over half of all fatal crashes, some of which could have been prevented if a vertical pavement edge drop-off had not been present. Drop-offs occur when there are height differences between a paved road and the adjacent graded material. Conventional paving techniques result in vertical or nearly vertical pavement edges, which can cause safety concerns when they are exposed.

A cutting-edge technology known as the SafetyEdge℠ is a treatment that minimizes drop-off-related crashes. With this treatment, the pavement edge is sloped at an angle of 30 degrees to reduce the resistance of the tire remounting the drop-off. The reduced resistance is intended to allow a more controlled reentry onto the traveled way.