A STUDY OF LEFT-HAND EXIT RAMPS ON FREEWAYS
THIS PAPER REVIEWS PERTINENT LITERATURE ON OPERATIONAL ASPECTS OF LEFT-HAND RAMPS AND GIVES A SUMMARY OF THE STATUS OF KNOWLEDGE, ALONG WITH A LIST OF THE MORE IMPORTANT REFERENCES. TIME-LAPSE PHOTOGRAPHY WAS USED IN MAKING FIELD STUDIES OF THREE LEFT-HAND EXIT RAMPS AND ONE RIGHT-HAND EXIT RAMP ON THE CONGRESS STREET EXPRESSWAY IN CHICAGO. DETAILED ANALYSES OF VOLUME, SPEEDS, DENSITY, EXITING PATHS, AND HAZARDOUS MANEUVERS WERE CARRIED OUT AND THE RESULTS USED TO CHECK A HYPOTHETICAL FORMULATION OF THE OPERATIONAL CHARACTERISTICS TO BE EXPECTED FOR LEFT-HAND EXIT RAMPS. SPECIAL ANALYSES WERE MADE OF OPERATIONAL CHARACTERISTICS OF FAMILIAR VS UNFAMILIAR DRIVERS, AS DETERMINED BY INTERVIEWING DRIVERS AFTER THEY HAD EXITED FROM THE FREEWAY. IT WAS CONCLUDED THAT THE LEFT-HAND EXIT RAMPS STUDIED OPERATE QUITE SATISFACTORILY. /AUTHOR/
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Supplemental Notes:
- 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:
- Berry, Donald S
- Ross, Graham L D
- Pfefer, Ronald C
- Publication Date: 1963
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 1-16
- Monograph Title: Freeway operations
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Serial:
- Highway Research Record
- Issue Number: 21
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Analysis; Drivers; Field studies; Interchange ramps; Intersection elements; Interviewing; Operations; Ramps; Reviews; Studies; Time lapse photography; Traffic density; Traffic speed; Traffic volume
- Uncontrolled Terms: Driver interviews
- Geographic Terms: Chicago (Illinois)
- Old TRIS Terms: Freeway ramps; Left side ramps; Study analysis
- Subject Areas: Administration and Management; Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00224744
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Oct 28 1994 12:00AM