TRAFFIC DELAY AND WARRANTS FOR CONTROL DEVICES
DELAY TO VEHICULAR AND PEDESTRIAN TRAFFIC IS ONE OF SEVERAL CRITERIA FREQUENTLY USED IN THE SELECTION AND EVALUATION OF TRAFFIC CONTROL DEVICES. IN THE PAST, THERE HAS BEEN NO PRACTICAL TECHNIQUE FOR MEASURING, RECORDING, AND ANALYZING DELAY DATA IN SUFFICIENT QUANTITIES TO PROVIDE A SOUND BASIS EITHER FOR DEVELOPING DELAY-BASED WARRANTS OR FOR DETERMINING THE RELATIVE EFFECTIVENESS OF VARIOUS CONTROL DEVICES IN LIMITING DELAY TO TOLERABLE VALUES. A UNIQUE DIGITAL DELAY DATA RECORDER THAT WAS DEVELOPED AND USED SUCCESSFULLY FOR COLLECTING OVER 240 HOURS OF FIELD DATA AT 19 DIFFERENT INTERSECTIONS IS DESCRIBED. THIS DEVICE RECORDS UP TO 12 CHANNELS OF INFORMATION FROM HUMAN OBSERVERS OR TRAFFIC SIGNAL CONTROLLERS IN A FORM DIRECTLY SUITABLE FSUITABLE FOR COMPUTER PROCESSING. COMPLETE SUMMARY STATISTICS, WHICH CAN INVOLVE PROCESSING AS MANY AS 360,000 DATA ITEMS, CAN BE OBTAINED ON AN OVERNIGHT BASIS FOR 6 HOURS OF FIELD OBSERVATION. THESE STATISTICS INCLUDE 19 NELAY RELATED TRAFFIC PARAMETERS AND MAY BE SUMMARIZED FOR ANY SELECTED TIME INTERVALS. ANALYSIS OF DELAY DATA FROM FIELD STUDIES CONDUCTED OVER A 3-YEAR PERIOD FACILITATED THE DEVELOPMENT OF A NEW SET OF MINIMUM VOLUME WARRANTS FOR THE INSTALLATION OF FOUR-WAY STOP-SIGN CONTROL AND THE VALIDATION OF A PROPOSED SET OF TRAFFIC VOLUME WARRANTS FOR THE INSTALLATION OF ACTUATED SIGNAL CONTROL. THESE WARRANTS ARE PRESENTED IN A TABULAR AND GRAPHIC FORM THAT IS SUITABLE FOR READY APPLICATION BY PRACTICING TRAFFIC ENGINEERS. /AUTHOR/
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Availability:
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Supplemental Notes:
- Sponsored by Committee on Traffic Control Devices. 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:
- Vodrazka, Walter C
- Lee, Clyde E
- Haenel, Herman E
- Publication Date: 1971
Media Info
- Media Type: Print
- Features: Figures; References;
- Pagination: pp 79-91
- Monograph Title: Traffic control and driver information
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Serial:
- Highway Research Record
- Issue Number: 366
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Data collection; Digital computers; Multiway stop signs; Signalized intersections; Stop signs; Traffic actuated controllers; Traffic control devices; Traffic delays; Warrants (Traffic control devices)
- Uncontrolled Terms: Criteria
- Old TRIS Terms: Data recording; Digital systems; Four way stop signs
- Subject Areas: Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00226190
- Record Type: Publication
- ISBN: 0309019818
- Report/Paper Numbers: HS-011 999
- Files: TRIS, TRB
- Created Date: Mar 20 1972 12:00AM