EFFECT OF GUARDRAIL IN NARROW MEDIAN UPON PENNSYLVANIA DRIVERS
VEHICULAR SPEED, LATERAL PLACEMENT AND CLEARANCE WERE MEASURED BEFORE AND AFTER THE ERECTION OF A BARRIER ON A 4-FT CENTRAL RESERVE OF A DIVIDED HIGHWAY. NO REDUCTION IN VEHICULAR SPEEDS OR DENSITIES WAS FOUND BUT CLEARANCE BETWEEN ADJACENT VEHICLES WAS REDUCED BY 0.4 FT BECAUSE IN THE LANE NEAREST THE CENTRAL RESERVE VEHICULAR PLACEMENTS WERE SHIFTED TO THE RIGHT BY AS MUCH AS 0.5 FT AFTER THE BARRIER WAS INSTALLED. AN ACCIDENT STUDY WAS ALSO MADE INDICATING POSSIBLE FORM OF CONSTRUCTION OF THE BARRIER. /RRL/
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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
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Authors:
- Sacks, William Louis
- Publication Date: 1965
Media Info
- Media Type: Print
- Features: Figures; Photos; References; Tables;
- Pagination: pp 114-131
- Monograph Title: Geometric design and barrier rails
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Serial:
- Highway Research Record
- Issue Number: 83
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Barriers (Roads); Before and after studies; Car clearances (Railroads); Construction; Crash investigation; Crashes; Divided highways; Drivers; Following distance; Guardrails; Lateral placement; Measurement; Medians; Speed; Vehicles
- Uncontrolled Terms: Barriers; Position; Transverse
- Geographic Terms: Pennsylvania; United States
- Old TRIS Terms: Clearances; Following distance/of vehicles/; Narrow objects
- Subject Areas: Construction; Highways; Operations and Traffic Management; Safety and Human Factors; Vehicles and Equipment;
Filing Info
- Accession Number: 00225080
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Dec 12 1994 12:00AM