AUTOMATION OF THE SCHONFELD METHOD FOR HIGHWAY SURFACE TEXTURE CLASSIFICATION

The research reported here concerned the development of a system for measurement and automatic classification of pavement surface texture properties in accordance with the Schonfeld method. Electronic stereophotogrammetric techniques, previously used in the field of aerial mapping were first adapted to obtain digital height data from stereophotographs of the pavement surface. Algorithms were then developed to process these data on a computer and automatically classify the surface texture in accordance with the Schonfeld method, properly accounting for such effects as tire-pavement interaction and deep voids in the surface. Application of the computer algorithms was demonstrated to yield Schonfeld parameter values that correlated reasonably well with those obtained by the manual method, thereby proving the feasibility of an automated approach to the Schonfeld classification process. Preliminary designs of camera systems that could be mounted on highway vehicles and could collect the required photographic data were also developed and shown to be feasible. The automated procedure allows a much more comprehensive investigation of surface texture to be carried out than that allowed by the manual method. The detailed information obtained on pavement texture can provide valuable data for understanding the mechanics of skid resistance and the generation of noise due to vehicle tires. It can also be effective in the specification and control of pavement construction and for monitoring wear and polishing of pavements. /Author/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1976/602/602-011.pdf
• Summary URL:
  https://scholar.google.com/scholar_lookup?title=AUTOMATION+OF+THE+SCHONFELD+METHOD+FOR+HIGHWAY+SURFACE+TEXTURE+CLASSIFICATION&author=E.+Howerter&author=T.+Rudd&publication_year=1976
• Availability:
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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
• Authors:
  • Howerter, E D
  • Rudd, T J
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 57-61
• Monograph Title: Pavement design, evaluation and performance
• Serial:
  • Transportation Research Record
  • Issue Number: 602
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Algorithms; Automation; Classification; Computer programs; Data collection; Highways; Pavements; Paving; Photogrammetry; Rolling contact; Skid resistance; Surface course (Pavements); Texture
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00156004
• Record Type: Publication
• ISBN: 0309220710
• Files: TRIS, TRB
• Created Date: Aug 15 1977 12:00AM