Effect of Warning Signs on Curve Operating Speeds
The objective of this study is to evaluate the use of several warning signs and warning methods to identify those that have the greatest impact on reducing vehicle speeds when traversing a horizontal curve. Three sites were selected from a list of proposed sites for the testing of the various warning methods. Each warning treatment was installed and a five-day waiting period was allowed before operating speeds for the treatments were measured. The results of the various warning methods were mixed, however, some warning treatments were able to reduce operating speeds on a consistent basis. The most effective of these treatments were the transverse lines, the new combination Horizontal Alignment/Advisory Speed sign, and flashing lights on both the existing warning sign and new combination warning sign. It should also be noted here that for all three sites, a reduction in the average of the speeds over the 85th percentile speed was observed, indicating that most of the treatments have a reducing effect on the most unsafe driving, those traveling above the 85th percentile speed.
- Record URL:
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Corporate Authors:
University of Kentucky, Lexington
Kentucky Transportation Center
College of Engineering, 176 Raymond Building
Lexington, KY United States 40506-0281Kentucky Transportation Cabinet
200 Mero Street
Frankfort, KY United States 40622Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Vest, Adam
- Stamatiadis, Nikiforos
- Clayton, Adam
- Pigman, Jerry
- Publication Date: 2005-8
Language
- English
Media Info
- Media Type: Web
- Edition: Final Report
- Features: Figures; Photos; References; Tables;
- Pagination: 44p
Subject/Index Terms
- TRT Terms: Field studies; Highway curves; Operating speed; Road markings; Warning signs
- Uncontrolled Terms: Flashing lights; Horizontal curvature; Speed reduction
- Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;
Filing Info
- Accession Number: 01015088
- Record Type: Publication
- Source Agency: University of Kentucky, Lexington
- Report/Paper Numbers: KTC-05-20/SPR-259-03-1F, KTC-05-20-1F
- Contract Numbers: KYSPR-259-03
- Files: TRIS, USDOT, STATEDOT
- Created Date: Jan 6 2006 3:32PM