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Title: BASE-BENDING SINGLE SIGNPOSTS
Accession Number: 00210047
Record Type: Component
Abstract: USED; HOWEVER, THEY SHOULD BE DRIVEN IN SOIL TO AN EMBEDMENT IT AS DESIGNED TO ANSWER SPECIFIC RESEARCH QUESTIONS BY EVALUATING KINEMATIC AND PHENOMENOLOGICAL RESPONSE OF THE POST CONFIGURATIONS UNDER CONDISERATION OVER THE FULL OPERATIONAL RANGE OF ALL SIGNIFICANT IMPACT PARAMETERS. A STRUCTURAL FRACTIONAL, FACTORIAL EXPERIMENTAL DESIGN WAS EMPLOYED. THE STUDY OF BASE-BENDING SINGLE SIGNPOSTS WAS THE INITIAL EFFORT OF A MULTIPHASE PROGRAM. PRIMARY DATA REDUCTION WAS BASED ON PHOTOGRAMMETRIC INFORMATION OBTAINED FROM THREE HIGH-SPEED CAMERAS. BACKUP INFORMATION WAS OBTAINED FROM A FIFTH WHEEL ATTACHED TO THE TOW VEHICLE AND SPEED TRAPS. DETAILS ARE GIVEN OF THE TEST PROCEDURES AND TEST DATA ARE TABULATED. KINEMATIC RESPONSE WAS ASSESSED FROM DATA TAKEN FROM HIGH SPEED MOVIES BY OBSERVING A CONVENIENT TARGET ATTACHED TO THE SIDE OF THE CRASH VEHICLE. THE MAXIMUM DECELERATION CONCEPT IS DEFINED AND THE SIGNIFICANCE OF THE POST DEFLECTION ANGLE IS DISCUSSED. DETAILS ARE GIVEN OF A METHOD OF ASSESSMENT OF PROBABLE OCCUPANT INJURY AND A CURVE ILLUSTRATING UNRESTRAINED OCCUPANT INJURY ASSESSMENT IS PRESENTED. BASED ON THE RESULT OF THE INVESTIGATION, IT IS RECOMMENDED THAT USE BE MADE OF 2-INCH STEEL PIPE SIGNPOSTS DRIVEN TO AN EMBEDMENT DEPTH OF 3.5 FT IN SOIL. THE DESIRABLE MINIMUM SIGN POST HEIGHT ABOVE GROUND, IS 9 FEET. SINGLE 2.5 - INCH STEEL PIPE SIGNPOSTS AND SINGLE 8-POUND/FT FLANGED CHANNEL SIGNPOSTS ARE ADEQUATE HERE THE SINGLE 2-INCH SIGNPOST CANNOT BE
Supplemental Notes: Sponsored by Committee on Traffic Safety Barriers and Sign, Signal and Lighting Supports. 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.
Monograph Title: Monograph Accession #: 01410373
Authors: Zobel, Edward CPagination: pp 137-140
Publication Date: 1973
Serial: Conference:
52nd Annual Meeting of the Highway Research Board
Location:
Washington District of Columbia, United States Media Type: Digital/other
Features: Figures
(1)
; References
(11)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Design; Highways; Research; Safety and Human Factors
Files: TRIS, TRB
Created Date: Jul 31 1974 12:00AM
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