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Title: PROCEDURE FOR DETERMINING WORK ZONE SPEED LIMITS
Accession Number: 00727374
Record Type: Monograph
Abstract: This NCHRP Digest summarizes the findings of NCHRP Project 3-41, "Procedure for Determining Work Zone Speed Limits". The "Manual on Uniform Traffic Control Devices for Streets and Highways" has no uniform guidelines for determining work zone speed limits. At their 1988 joint meeting, the AASHTO Highway Subcommittee on Traffic Engineering and the Maintenance Technical Committee of the National Committee on Uniform Traffic Control Devices unanimously concurred that research was urgently needed to establish a procedure for determining work zone speed limits to address safety problems. The research reported here was initiated to meet this need. The researchers sought to answer three fundamental questions: (1) Are work zones with reduced speed limits safer? (2) What are the compliance levels with various speed limit reductions? and (3) What roadway and traffic factors should be considered in determining a work zone speed limit? To answer these questions, Graham-Migletz Enterprises, Inc. (GME) conducted a literature review and interviewed state and local highway agency officials in 12 states to learn about the procedures their agencies used to establish work zone speed limits and the perceived effectiveness of various speed limit reduction policies. In addition, the research included interviews and surveys to determine the attitudes of motorists, construction contractors, and construction liability insurance carriers concerning how work zone speed limits should be set. The results were considered in planning field data collection on vehicle speeds, traffic accidents, and traffic conflicts in work zones. A candidate procedure for appropriate work zone speed limits was formulated early in the research and revised, as appropriate, throughout the remainder of the project.
Supplemental Notes: This digest, prepared by L.R. Crowther and K.S. Opiela, is an excerpt from the contractor's final report. 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
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Pagination: 43 p.
Publication Date: 1996-9
Serial: Features: Figures
(4)
; References
(66)
; Tables
(16)
TRT Terms: Old TRIS Terms: Subject Areas: Administration and Management; Highways; Maintenance and Preservation; Operations and Traffic Management; Policy; Research; Safety and Human Factors; I60: Maintenance; I73: Traffic Control
Files: TRIS, TRB
Created Date: Oct 30 1996 12:00AM
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