PHOTOGRAPHIC TECHNIQUE FOR ESTIMATING SKID NUMBER AND SPEED GRADIENTS OF PAVEMENTS
A technique has been developed for determining skid number and speed gradients of pavements from a moving vehicle. Photographs were made of the pavement by using a light at low-incidence angle to project shadows across the peaks and valleys of pavement macrotexture. The photographs were compared to standard photogrpahs of pavements with known gradients. The ratings were converted to estimated skid number and speed gradient by using a regression equation. The technique is economical, valid, and reliable. /Author/
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- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
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Supplemental Notes:
- Publication of this paper sponsored by Committee on Surface Properties-Vehicle Interaction. 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:
- McDonald, L Bruce
- Blackburn, Robert R
- Kobett, Donald R
- Publication Date: 1977
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References;
- Pagination: pp 13-21
- Monograph Title: Pavement surface properties and performance
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Serial:
- Transportation Research Record
- Issue Number: 633
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Highway grades; Mathematical models; Pavements; Photography; Ranking (Statistics); Skidding; Slopes; Speed
- Uncontrolled Terms: Skid number
- Old TRIS Terms: Ranking
- Subject Areas: Data and Information Technology; Design; Highways; Pavements;
Filing Info
- Accession Number: 00173175
- Record Type: Publication
- ISBN: 0309026598
- Report/Paper Numbers: HS-022 762
- Files: TRIS, TRB
- Created Date: May 3 1978 12:00AM