| Title | Proven Safety Countermeasures - Enhanced Delineation and Friction for Horizontal Curves |
|---|---|
| Record ID | 74471 |
| Personal Name Contributor |
Cheung, Joseph; Julian, Frank |
| Corporate Creator | United States. Department of Transportation. Federal Highway Administration. Office of Safety |
| Publisher | United States. Department of Transportation. Federal Highway Administration. Office of Safety |
| Publication Date | 20111101 |
| Language | English |
| Abstract | Low-cost safety treatments vary by the severity of the curvature and the operating speed. Low-cost treatments typically include methods for warning the driver in advance of the curve, but treatments will vary by intensity of the warning. Implementing the recently published curve treatments included in the Manual on Uniform Traffic Control Devices (MUTCD) should improve curve safety over past practices by providing consistency. However, additional enhancements can be made with post-mounted delineation in the curve or an enhanced signing treatment that may include larger chevron signs with enhanced retroreflectivity. For more challenging curves, dual indicated advanced signs with constant flashing beacons may be effective. Pavement markings are also an effective communication tool to indicate the alignment change. Pavement friction is critical for changing vehicle direction and ensuring the vehicle remains in its lane. Traditional friction courses or high friction surface treatments should be considered for curves with numerous wet weather crashes or severe curves with higher operating speeds. |
| Rosap ID | dot:49434 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/49434 |
| TRT Terms | Traffic safety; Countermeasures; Highway curves; Friction course |
| Geographical Coverage |
United States |
| Report Number | FHWA-SA-12-009 |
| Resource type | Brief |
| URL | https://ntlrepository.blob.core.windows.net/lib/74000/74400/74471/FHWA-SA-12-009.pdf |
| Format | |
| Database | NTL Digital Repository |