LOCATION, SELECTION, AND MAINTENANCE OF HIGHWAY GUARDRAILS AND MEDIAN BARRIERS
GUARDRAIL AND MEDIAN BARRIER DESIGN INFORMATION IS PRESENTED WHICH WILL PERMIT THE SAFEST HIGHWAYS CONSISTENT WITH CURRENT STATE-OF-THE-ART BARRIER TECHNOLOGY. SINCE GUARDRAIL AND MEDIAN BARRIER INSTALLATIONS ARE HAZARDOUS IN THEMSELVES, EMPHASIS IS PLACED ON REDUCING THE NUMBER OF INSTALLATIONS TO THOSE WHICH CAN BE CLEARLY JUSTIFIED. THE DESIGN PROCEDURE PRESENTED INVOLVES TWO STEPS: (1) DETERMINATION OF POINTS AND LENGTH OF NEED FOR THE INSTALLATION, AND (2) SELECTION AND LAYOUT OF APPROPRIATE GUARDRAIL OR MEDIAN BARRIER SYSTEM. SPECIFIC WARRANTS FOR AN INSTALLATION ARE DETERMINED FROM THE ROADWAY PROPERTIES (SUCH AS SHOULDER EMBANKMENT GEOMETRY) AND THE LOCATION AND TYPE OF ROADSIDE OBSTACLES. GUARDRAIL AND MEDIAN BARRIER DESIGNS EVALUATED BY FULL-SCALE CRASH TESTS AND SATISFACTORY SERVICE PERFORMANCE ARE PRESENTED TOGETHER WITH A SELECTION PROCEDURE. MEDIAN BARRIER WARRANTS ARE DETERMINED BY MEDIAN WIDTH AND TRAFFIC VOLUME. THESE WARRANTS ARE BASED ON RAN- OFF-THE-ROAD AND ACROSS-THE-MEDIAN TYPE OF ACCIDENT STATISTICS AND DICTATE USE OF INSTALLATION ONLY WHERE ACCIDENT SEVERITY WOULD BE LESS FOR A VEHICLE'S STRIKING THE BARRIER THAN PERMITTING IT ACCESS TO THE SCREENED AREA. PROCEDURES FOR EXAMINING, CLASSIFYING AND DELINEATING SERVICING ACTION FOR EXISTING GUARDRAIL AND MEDIAN BARRIER INSTALLATIONS ARE DESCRIBED.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00775614
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Supplemental Notes:
- Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. No 54, pp 1-63, 21 FIG, 6 TAB, 4 APP
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Authors:
- Michie, J D
- Calcote, L R
- Publication Date: 1968
Media Info
- Media Type: Digital/other
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Serial:
- NCHRP Report
- Issue Number: 54
- Publisher: Transportation Research Board
- ISSN: 0077-5614
Subject/Index Terms
- TRT Terms: Crash rates; Crash severity; Crash tests; Crashes; Geometric design; Guardrail terminals; Guardrails; Highway design; Highway maintenance; Highways; Location; Maintenance; Median barriers; Medians; Roadside structures; Structural design; Testing; Traffic volume; Warrants (Traffic control devices); Width
- Old TRIS Terms: Guardrail warrants
- Subject Areas: Design; Highways; Maintenance and Preservation; Operations and Traffic Management; Research; Safety and Human Factors;
Filing Info
- Accession Number: 00203350
- Record Type: Publication
- Files: TRIS, ATRI
- Created Date: Sep 16 1994 12:00AM