REPORT OF PROJECT COMMITTEE ON SEQUENCE AND OVERLAPPING OF AMBER INDICATION IN TRAFFIC CONTROL SIGNALS
ONE CONCLUSION WHICH MAY NOW BE DRAWN IN THIS STUDY OF TRAFFIC SIGNAL SEQUENCE IS THAT THERE SHOULD BE AN INTERMEDIATE INTERVAL CONSISTING OF A THIRD LIGHT, YELLOW IN COLOR, TO WARN OF IMPENDING CHANGE FROM GREEN TO RED. COLOR SEQUENCES ARE NOW IN A STATE OF FLUX DUE TO NEW DEVELOPMENTS IN WIRING AND CONTROL EQUIPMENT. OWING TO THE LOCK OF FACTUAL DATA AS TO THESE IMPROVEMENTS, IT IS IMPOSSIBLE TO RECOMMEND AT THIS TIME AN ULTIMATE STANDARD. A STUDY OF THE REGULATIONS OF VARIOUS CITIES GOVERNING TRAFFIC LIGHTS INDICATES THAT THESE REGULATIONS ARE VERY SIMILAR. SEVEN OUT OF 27 STATES INCLUDED IN THIS STUDY HAVE LAWS GOVERNING SIGNAL SEQUENCES. IT WILL NOT, HOWEVER, BE A DIFFICULT PROCEDURE TO CHANGE THESE LAWS TO PERMIT THE ADOPTION OF A STANDARD SEQUENCE IF AND WHEN SUCH SEQUENCE CAN BE ADOPTED. OWING TO THE LIMITED AMOUNT OF ACCIDENT PREVENTION AND OBSERVANCE DATA AVAILABLE ON ANY ONE OF THE VARIOUS SEQUENCES OF OPERATING THE YELLOW SIGNAL INDICATION, IT IS RECOMMENDED THAT ALL CITIES THAT HAVE MADE CHANGES BE ASKED TO SUBMIT FACTUAL BEFORE AND AFTER DATA AS TO OBSERVANCE, ACCIDENT PREVENTION AND ENFORCEMENT, AND THAT EXPERIMENTAL RESEARCH BE CONDUCTED BY CITY AND STATE AUTHORITIES TO DETERMINE WHICH SEQUENCE OR SEQUENCES SHOULD BE ADOPTED IN CONTROLLING TRAFFIC BY SIGNAL LIGHTS AND THAT THE YELLOW SIGNAL SEQUENCE BE TRIED OUT IN VARIOUS CITIES SO THAT THE ADVANTAGES OR DISADVANTAGES OF THE YELLOW SEQUENCE IMPROVEMENTS CAN BE STUDIED ON A SCALE BROAD ENOUGH TO WARRANT THE ADOPTION OF A GENERAL STANDARD. /AUTHOR/
- Record URL:
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Supplemental Notes:
- Vol 20, pp 681-693, 5 TAB. 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:
- Van Duzer, W A
- Publication Date: 1941
Media Info
- Media Type: Digital/other
- Monograph Title: Proceedings of the Twentieth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 3-6, 1940
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Serial:
- Highway Research Board Proceedings
- Volume: 20
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Yellow interval (Traffic signal cycle)
- Subject Areas: Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00225972
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Aug 15 1971 12:00AM