01674975

Monograph

http://www.trb.org/Publications/Blurbs/177739.aspx

More than half of all traffic fatalities result from roadway departure crashes. This type of crash occurs after a vehicle crosses an edge line or centerline or otherwise leaves the traveled way. A variety of engineering strategies, often referred to as countermeasures, have been implemented by state and local agencies to prevent roadway departure crashes and reduce the severity of injuries if crashes do occur. This synthesis documents countermeasures being used by state departments of transportation to prevent roadway departure crashes. Information for this study was gathered through a literature review and a survey of state departments of transportation. Three case examples provide examples of specific countermeasures and roadway departure programs. Countermeasures that have been shown to be especially effective in reducing roadway departure crashes or their severity include: shoulder, edge-line, and centerline rumble strips; SafetyEdge; high-friction surface treatment; and cable median barriers.

Project 20-05, Topic 48-01

English

59p

2018

NCHRP Synthesis of Highway Practice

9780309390316

Digital/other

Appendices; Figures; Photos; References; Tables

Clear zones; Countermeasures; High risk locations; Highway safety; Median barriers; Ran off road crashes; Rumble strips; Surface treating

SafetyEdge

Design; Highways; Safety and Human Factors

TRIS, TRB, ATRI

Jul 11 2018 2:41PM