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Title: PHOTOGRAMMETRIC DATA ACQUISITION FOR A FREEWAY RAMP OPERATIONS STUDY
Accession Number: 00203512
Record Type: Component
Abstract: THE EFFECTS OF WEATHER AND ILLUMINATION ON A FREEWAY RAMP DRIVER'S DECISION TO ACCEPT OR REJECT A MAINSTREAM GAP HAS BEEN STUDIED BY A PHOTOGRAMMETRIC TECHNIQUE. THE PHOTO COORDINATES OF THE VEHICLE ON EACH PHOTOGRAPH WERE MEASURED AND TRANSFORMED INTO GROUND COORDINATES USED TO CALCULATE VEHICLE LENGTH, SPACING, AND SPEED. ABOUT 3400 VEHICLE TRAJECTORIES WERE COMPUTED AND FILED IN A DATA BANK FOR SUBSEQUENT ANALYSIS. ALTHOUGH NO PRECISE INFORMATION IS AVAILABLE AS TO THE OVERALL ERROR DERIVED FROM THE OPERATOR, REDUCTION SYSTEM, AND TRANSFORMATION METHODS, ANALYSIS OF THE TRAJECTORY DATA INDICATES THE ERROR IN THE COMPUTED POSITION OF A VEHICLE FOR ANY GIVEN FRAME AVERAGES ABOUT PLUS OR MINUS 2.5 FEET. /AUTHOR/
Supplemental Notes: Paper sponsored by Committee on Photogrammetry and Aerial Surveys and Committee on Pavement Condition Evaluation and presented at the 49th 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.
Monograph Title: Monograph Accession #: 01410258
Authors: Taylor, James ICarter, Roger GPagination: pp 78-87
Publication Date: 1970
Serial: Media Type: Digital/other
Features: Figures
(5)
TRT Terms: Old TRIS Terms: Subject Areas: Design; Geotechnology; Highways; Pavements; Vehicles and Equipment
Files: TRIS, TRB
Created Date: Dec 28 1970 12:00AM
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