PRESENT SERVICEABILITY RATING AND PRESENT SERVICEABILITY INDEX CONCEPTS

CONCEPTS ARE REVIEWED THAT ARE ASSOCIATED WITH THE PRESENT SERVICEABILITY RATING (PSR) AND THE PRESENT SERVICEABILITY INDEX (PSI). THE TERM "PAVEMENT PERFORMANCE" IMPLIES, FROM THE STANDPOINT OF USER, A PARTICULAR LEVEL OF SERVICE AT ANY POINT IN TIME, I.E., A PARTICULAR PRESENT SERVICEABILITY. IT HAS BEEN FOUND THAT USER ASSESSMENTS OF SERVICEABILITY EXHIBIT GOOD CONSISTENCY WITHIN AND BETWEEN THEMSELVES, I.E., SUBJECTIVE PSR'S ARE AN APPROPRIATE TOOL FOR ASCERTAINING PAVEMENT PERFORMANCE AT A GIVEN TIME. THE SEARCH FOR ONE OR MORE OBJECTIVE MEASURES OF PAVEMENT CONDITION THAT WOULD CORRELATE WITH PSR'S WAS RESTRICTED TO VARIABLES WHOSE VARIATIONS CAN BE SENSED BY USERS. A PSI WAS DEFINED AS AN ALGEBRAIC FUNCTION OF PSR CORRELATES WHOSE COEFFICIENTS ARE DETERMINED THROUGH MULTIPLE REGRESSION ANALYSIS FOR THE PURPOSE OF FINDING THE SET OF CORRELATES THAT MINIMIZED THE SUM OF THE SQUARE OF DIFFERENCES BETWEEN PSR AND PSI AND THAT EXCLUDED INSIGNIFICANT CORRELATES. WHEN PSI VALUES FOR A PARTICULAR PAVEMENT ARE PLOTTED AGAINST TIME, IT BECOMES POSSIBLE TO PROJECT THE PERIOD OVER WHICH THE PAVEMENT WILL PROVIDE ACCEPTABLE SERVICE, GIVEN TRAFFIC DENSITY AND LOADING CHARACTERISTICS AND ASSUMING THAT CLIMATE AND SOIL CHARACTERISTICS REMAIN CONSTANT.

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/sr/sr133/133-004.pdf
• Supplemental Notes:
  • 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
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Irick, Paul
• Conference:
  • Workshop on Pavement Evaluation Using Road Meters
  • Location: West Lafayette Indiana, United States
  • Date: 1972-4-18 to 1972-4-20
• Publication Date: 1973

Media Info

• Media Type: Print
• Pagination: p. 8-10
• Monograph Title: PAVEMENT EVALUATION USING ROAD METERS
• Serial:
  • Highway Research Board Special Report
  • Issue Number: 133
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Serviceability
• Uncontrolled Terms: Serviceability Index
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 00206068
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: May 21 1973 12:00AM