MEDIAN TREATMENT STUDY OF WASHINGTON STATE HIGHWAYS
Across the median crashes are high severity, often fatal crashes occurring when errant vehicles cross the median and enter the opposing lanes of travel. Guidelines for the installation of median barriers presented in the AASHTO Roadside Design Guide were developed in the 1960s. A study of across the median crashes on Washington's multilane, divided state highways, with full access control, was conducted to evaluate median barrier guidelines and identify specific highway sections where installation of a barrier is desirable. A benefit/cost analysis was conducted to evaluate the cost effectiveness of median barrier installation. The analysis was used to develop guidelines for median barrier installation. In addition, the benefit/cost methodology provides a means for ranking median barrier needs based on past crash history. This ranking will allow these improvements to compete for safety improvement funds.
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Corporate Authors:
Washington State Department of Transportation
Transportation Building, 310 Maple Park Avenue SE, P.O. Box 47300
Olympia, WA United States 98504-7300 -
Authors:
- Glad, R W
- Albin, R B
- McIntosh, D M
- Olson, D K
- Publication Date: 2002-3
Language
- English
Media Info
- Pagination: 24 p.
Subject/Index Terms
- TRT Terms: Access control (Transportation); Benefit cost analysis; Crashes; Divided highways; Guidelines; Improvements; Median barriers; Medians; Multilane highways; Roadside improvement; Safety
- Geographic Terms: Washington (State)
- Subject Areas: Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure;
Filing Info
- Accession Number: 00930713
- Record Type: Publication
- Report/Paper Numbers: WA-RD-516.1
- Files: NTL, TRIS, STATEDOT
- Created Date: Sep 18 2002 12:00AM