RATING FLEXIBLE PAVEMENT SURFACE CONDITION

A PAVEMENT-CONDITION RATING METHOD WAS DEVELOPED BY THE DEPARTMENT OF HIGHWAYS OF SASKATCHEWAN (DHS). PRIOR TO THE DEVELOPMENT OF THE DHS SYSTEM, A LITERATURE SURVEY WAS CONDUCTED OF HIGHWAY-CONDITION RATING METHODS. VARIOUS OBJECTIVE AND SUBJECTIVE RATING SYSTEMS ARE DISCUSSED. DHS NEEDED A RATING SYSTEM TO DETERMINE THE SECTIONS OF PAVEMENT THAT SHOULD BE INCLUDED IN THE CAPITAL MAINTENANCE PROGRAM (SEAL COAT OR BITUMINOUS OVERLAY) AND TO ESTIMATE THE CAPITAL MAINTENANCE COSTS THAT MAY BE ANTICIPATED IN THE FUTURE YEARS. BECAUSE SEALCOAT AND BITUMINOUS OVERLAYS ARE THE ONLY TWO REPAIR METHODS EMPLOYED UNDER CAPITAL MAINTENANCE EXPENDITURE AND BECAUSE THE OBJECTIVE OF THE RATING IS TO DETERMINE THE NEED FOR SUCH REMEDIAL MEASURES, THE SURFACE DEFECTS MUST BE CLASSIFIED ACCORDING TO AND RELATED TO THE SPECIFIC REPAIR METHOD THAT WILL BE USED. THE DHS RATING FORM WAS DESIGNED WITH TWO SECTIONS FOR THESE TWO REPAIR METHODS AND A THIRD SECTION FOR ISOLATED DEFECTS THAT CAN BE REPAIRED BY LOCALIZED OR SPOT MAINTENANCE. THE RATING METHOD IS BASICALLY SUBJECTIVE IN ITS APPROACH BECAUSE THE EXTENT OR SEVERITY OF THE DEFECTS IS NOT MEASURED BUT DESCRIBED ACCORDING TO SEVERITY. THE SEVERITY RATING OF EACH DEFECT IS QUANTIFIED USING A NUMERICAL VALUE THAT IS WEIGHTED AGAINST OTHER DEFECTS. THE METHOD EMPLOYED IN WEIGHTING THE SEVERITY OF DEFECTS AGAINST EACH OTHER AND ASSIGNING A WEIGHTED VALUE IS DESCRIBED. WHEN PAVEMENT SURFACE CONDITIONS ARE RATED WITH THE DHS METHOD, IT IS RECOMMENDED THAT A PANEL OF AT LEAST FOUR PEOPLE SHOULD EACH RATE A SECTION OF PAVEMENT INDEPENDENTLY, AND THE FINAL RATING CONSIST OF THE AVERAGE RATING FOR THE PANEL. THE FOLLOWING DEFECTS ARE DISCUSSED WHICH ARE RATED BY THE DHS METHOD: NONFATIGUE CRACKING, SLICKING, RAVELING, SHOVING, RUTTING, SHEAR FAILURE, FATIGUE CRACKING, AND ROUGHNESS. THE SUBJECTIVE RATING METHOD DEVELOPED BY DHS HAS BEEN USED DURING THE PAST THREE YEARS AND HAS PROVEN TO BE HIGHLY ACCEPTABLE IN ITS APPLICATION.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1969/300/300-004.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Salvaging Old Pavements by Resurfacing, Maintenance of Bituminous Pavements, and Maintenance of Portland Cement Concrete Pavements and presented at the 48th 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.
• Authors:
  • Winnitoy, W E
• Publication Date: 1969

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 16-26
• Monograph Title: Design of overlays and pavement rehabilitation
• Serial:
  • Highway Research Record
  • Issue Number: 300
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Bituminous overlays; Evaluation; Failure; Forecasting; Maintenance management; Pavement cracking; Pavement maintenance; Pavement performance; Pavements; Plastic deformation; Ratings; Reviews; Seal coats; Stripping (Pavements)
• Uncontrolled Terms: Maintenance costs
• Old TRIS Terms: Shear failures
• Subject Areas: Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 00207076
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Feb 16 1970 12:00AM