The purpose of this course is to encourage you to use this information to evaluate problems and implement appropriate treatments for problem curve locations. These treatments should help reduce roadway departure crashes, injuries, and fatalities.

This course summarizes practical information on where, when, or how to apply safety treatments for horizontal curves or winding sections. These treatments are relatively low cost versus geometric design improvements (degree of curve, shoulders, superelevation, curve length, cross-section, etc.). Information for each treatment generally included description, application guidelines, design elements and materials, effectiveness, and cost.

Estimates for treatment effectiveness in reducing crashes were included if available. Actual observed effectiveness values of a treatment can vary depending on its location.