NEW YORK STATE THRUWAY USE OF ROAD TEST FINDINGS

THE BASIC FORMULA DEVELOPED AT THE AASHO ROAD TEST IS PRESENTED FOR DETERMINATION OF PAVEMENT SERVICEABILITY INDEX. BECAUSE RESULTS OF THE TEST ROAD WERE PRODUCED BY A SINGLE TYPE OF VEHICLE ACTING ON A SPECIFIC TEST SECTION, IT WAS NECESSARY TO DEVELOP AN EQUATION WHICH WOULD MAKE IT POSSIBLE TO USE THE ROAD TEST DATA UNDER VARYING TYPES OF TRAFFIC. THIS IS CALLED THE MIXED TRAFFIC THEORY WHICH WAS DEVELOPED BY F.H. SCRIVNER OF THE ROAD TEST STAFF. THIS THEORY IS PRESENTED. FOR USE OF THESE FORMULAS, IT IS NECESSARY TO DETERMINE THE PAST AND EXPECTED FUTURE TRAFFIC DENSITY FOR SECTIONS OF A ROUTE UNDER STUDY HAVING SUBSTANTIALLY THE SAME TRAFFIC CHARACTERISTICS. TABLES ARE PRESENTED WHICH GIVE THE TRAFFIC DENSITY, AVERAGE AXLE CLASSIFICATION IN PERCENT, AND WEIGHT CLASSIFICATION FOR THE N.Y. THRUWAY. FORMULAS ARE PRESENTED FOR THE CALCULATION OF ROAD DISTRIBUTION CURVES BY AXLE LOADS. THE NEXT STEP IN A MAINTENANCE SURVEY IS THE DETERMINATION OF THE ACCUMULATED PAVEMENT DAMAGE FROM THE TIME OF OPENING TO TRAFFIC TO THE TIME OF THE SURVEY. THIS FIGURE MAY THEN BE PLOTTED ON LOG-LOG PAPER VERSES TOTAL NUMBER OF AXLE LOADS WHICH HAVE OCCURRED DURING THAT TIME INTERVAL. SUCH ACCUMULATED DAMAGE IS A FUNCTION OF THE PSI. THAT FIGURE, FOR THE DIFFERENT SECTIONS OF A ROUTE UNDER STUDY, HAVING DIFFERENT TRAFFIC VOLUMES MUST BE DETERMINED. A TWO PART FIELD SURVEY OF PAVEMENT CHARACTERISTICS IS PERFORMED. THE INITIAL PART CONSISTS OF VISUAL SURVEY OF PAVEMENT CONDITIONS AND THE SECOND INVOLVES A SURVEY OF PAVEMENT SLOPE VARIANCE BY MEANS OF A PROFILOMETER. MEANS OF DETERMINING THESE VALUES ARE PRESENTED. THESE METHODS OF PREVENTIVE MAINTENANCE PLANNING WILL PROVE VALUABLE.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/sr/sr73/73-019.pdf
• Supplemental Notes:
  • pp 291-298, 3 FIG, 6 TAB 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:

  Highway Research Board

  2101 Constitution Avenue, NW
  Washington, DC    20418

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Tallamy, Bertram D
• Discussers:
  • Diers, H E
• Conference:
  • Highway Research Board Conference on the AASHO Road Test
  • Location: St Louis MO, United States
  • Date: 1962-5-16 to 1962-5-18
• Publication Date: 1962

Media Info

• Monograph Title: THE AASHO ROAD TEST - PROCEEDINGS OF A CONFERENCE HELD MAY 16-18, 1962, ST. LOUIS, MISSOURI
• Serial:
  • Highway Research Board Special Report
  • Issue Number: 73
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Axle load force; Defects; Highway maintenance; Pavement distress; Pavement performance; Pavements; Slopes; Theory; Traffic density; Traffic volume; Variance
• Non-Preferred Terms: Serviceability
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Serviceability Index
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 00207123
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 26 1970 12:00AM