LEF ESTIMATION FROM CANROAD PAVEMENT LOAD-DEFLECTION DATA

Load equivalency factors (LEFs) versus axle-load regression equations are reported for single-, tandem-, and tridem-axle groups. These functions have been developed from truck loading test data collected at nine sites across Canada in 1985 by the Canroad Transportation Research Corporation. While the load on the axle groups dominated the regression equations, pavement temperature, axle spacing, and vehicle velocity were found to be statistically significant for the tandem-axle groups at a number of the sites. Regression analysis of the pooled tandem data showed that load and axle spacing were significant. Analysis of the pooled tridem-axle group data showed that load, axle spacing, structural number, and vehicle speed were significant. The load equivalency functions are compared with the AASHTO functions and the differences highlighted.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1988/1196/1196-017.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=LEF+ESTIMATION+FROM+CANROAD+PAVEMENT+LOAD-DEFLECTION+DATA&author=L.+Rilett&author=B.+Hutchinson&publication_year=1988
• Availability:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1196, Pavement Evaluation and Rehabilitation. 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:
  • Rilett, L R
  • Hutchinson, B G
• Publication Date: 1988

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 170-178
• Monograph Title: Pavement evaluation and rehabilitation
• Serial:
  • Transportation Research Record
  • Issue Number: 1196
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Axle load force; Axles; Deflection; Equations; Load factor; Motor vehicles; Pavements; Regression analysis; Spacing; Speed; Tandem axle loads; Temperature; Traffic equivalence factor; Traffic speed
• Uncontrolled Terms: Axle spacing; Tridem axles
• Old TRIS Terms: Pavement deflection; Tandem axles
• Subject Areas: Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00490157
• Record Type: Publication
• ISBN: 0309047714
• Files: TRIS, TRB
• Created Date: Dec 31 1989 12:00AM