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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

Curve Safety Solutions


Horizontal curves account for more than 25 percent of fatal crashes and the average crash rate for curves is approximately three times higher than tangent segments. Transportation agencies have a number of horizontal curve safety countermeasures at their disposal to improve the safety of collision-prone curves.  This flyer introduces a family of curve solutions that are underutilized but still highly effective and can be considered if other treatments do not address site- or crash- specific needs.

Last updated: Wednesday, April 12, 2023