CLEARANCE INTERVAL AT TRAFFIC SIGNALS
A PILOT STUDY WAS UNDERTAKEN TO IDENTIFY PROMISING MODIFICATIONS OF AMBER PERIOD DURATION, TRANSVERSE PAVEMENT MARKINGS, AND SUPPLEMENTAL ADVANCED SIGNING THAT GAVE EVIDENCE OF IMPROVEMENTS OF SAFE OPERATIONS AT SIGNALIZED INTERSECTIONS. THE DILEMMA ZONE PROBLEM FOR MINIMUM AMBER PERIODS WAS EXTENSIVELY RESEARCHED. IT WAS FOUND THAT INCREASING THE AMBER PHASE AT AN URBAN LOCATION FROM 3 TO 5 SECONDS INCREASED THE PERCENTAGE OF MOTORISTS OPERATING IN AN UNSAFE OR UNEXPECTED MANNER. INCREASING THE AMBER PHASE AT THE RURAL LOCATION FROM 5 TO 7 SECONDS DECREASED THE PERCENTAGE OF MOTORISTS OPERATING IN AN UNSAFE OR UNEXPECTED MANNER. HOWEVER, IT WAS FOUND THAT THE INSTALLATION OF EXPERIMENTAL TRANSVERSE PAVEMENT MARKINGS AT THE URBAN LOCATION SLIGHTLY DECREASED THE PERCENTAGES OF MOTORISTS OPERATING IN AN UNSAFE OR UNEXPECTED MANNER. ALSO, THE INSTALLATION OF EXPERIMENTAL TRANSVERSE PAVEMENT MARKINGS AT THE RURAL LOCATION INCREASED THE PERCENTAGE OF MOTORISTS OPERATING IN AN UNSAFE OR UNEXPECTED MANNER. /AUTHOR/
- Record URL:
-
Supplemental Notes:
- Paper sponsored by Committee on Traffic Control Devices and presented at the 47th Annual Meeting. 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.
-
Authors:
- May Jr, Adolf D
- Publication Date: 1968
Media Info
- Media Type: Digital/other
- Features: Figures; Tables;
- Pagination: pp 41 - 71
- Monograph Title: Guidance aspects of colored pavements and pavement markings - 5 reports
-
Serial:
- Highway Research Record
- Issue Number: 221
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Highway safety; Indicators (Instruments); Intersections; Road markings; Rural areas; Traffic signal indications; Traffic signal timing; Traffic signals; Urban areas; Yellow; Yellow interval (Traffic signal cycle)
- Old TRIS Terms: Traffic marking; Transverse markings
- Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;
Filing Info
- Accession Number: 00225341
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 9 1994 12:00AM