OVERLAYS FOR FLEXIBLE PAVEMENTS FOR THE 1968 INTERSTATE ESTIMATES

INTERSTATE FUNDS FOR ADDITIONAL STATE CONSTRUCTION WERE MADE AVAILABLE UNDER THE PROVISION OF IM 21-1-67 ISSUED BY THE BUREAU OF PUBLIC ROADS IN JANUARY, 1967. HOWEVER, CERTAIN CRITERIA WERE REQUIRED BEFORE A PROJECT COULD BECOME QUALIFIED: THE PROJECT MUST HAVE BEEN AUTHORIZED FOR CONSTRUCTION PRIOR TO OCTOBER 24, 1963, THE CONDITION OF THE PAVEMENT MUST EXHIBIT VISUAL EVIDENCE OF PHYSICAL STRESS, AND A COMPLETE STRUCTURAL ANALYSIS OF THE PAVEMENT DESIGN MUST ESTABLISH A NEED FOR ADDITIONAL THICKNESS. THESE CONSIDERATIONS ARE TO PROVIDE A SERVICEABILITY INDEX OF 2.0, 20 YEARS AFTER THE DATE OF AUTHORIZATION OF THE INITIAL PAVEMENT CONSTRUCTION PROJECT. THIS PAPER EXPLAINS THE METHODS OF DETERMINING CONDITIONS, DETERMINING STRUCTURAL ADEQUACY, DESIGN ANALYSIS, AND DETERMINING THE THICKNESS OF OVERLAY REQUIRED FOR FLEXIBLE PAVEMENTS INCLUDED IN THE 104 (B)5 REPORT FOR THE 1968 ESTIMATE OF THE COST OF COMPLETING THE INTERSTATE SYSTEM IN OKLAHOMA. A METHOD IS INCLUDED TO PREDICT WHETHER A PROJECT WILL MEET THE CRITERIA PRIOR TO 1972 EVEN THOUGH THE PRESENT CONDITION DOES NOT QUALIFY FOR IMMEDIATE OVERLAY. ALTHOUGH THIS METHOD OF ANALYSIS WAS USED FOR INTERSTATE PAVEMENTS, IT IS ONE WHICH MAY BE ADOPTED (AND HAS BEEN USED PRIOR TO THIS TIME) ON ANY SYSTEM. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1968/254/254-006.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.
• Authors:
  • Hartronft, B C
• Publication Date: 1968

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 68-74
• Monograph Title: Maintenance practices 1967
• Serial:
  • Highway Research Record
  • Issue Number: 254
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Flexible pavements; Overlays (Pavements); Pavement design; Paving; Serviceability; Structural analysis; Thickness
• Identifier Terms: Interstate Highway System
• Uncontrolled Terms: Serviceability Index
• Old TRIS Terms: Thickness design
• Subject Areas: Design; Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 00218440
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jan 23 1994 12:00AM