Daily Changes in Roughness on LTPP SPS-2 Test Sections

The Long Term Pavement Performance (LTPP) program collected 140 sets of 5 repeat profile measurements on nine of the remaining 13 Special Pavement Studies (SPS-2) test sections to evaluate the change in daily roughness on the SPS-2 test sections which are plain jointed, doweled pavements with 15 ft joint spacing. Profile measurements were obtained at three intervals during the day ranging in duration between 8 hrs and 14 hrs. The average daily change in roughness (MRI) was 12 in./mi with extremes to 38 in./mi. The design feature which had the greatest impact on daily roughness change was flexural strength. The higher flexural strength produced a 30% higher average daily change. The Permeable Asphalt Treated Base (PATB) provided the best mitigation to daily roughness changes and it appears there may be some benefit to the widened shoulder concept for controlling daily roughness changes.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFD90 Surface Properties - Vehicle Interaction.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Scofield, Larry
  • Springer, Jack
• Conference:
  • Transportation Research Board 94th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2015-1-11 to 2015-1-15
• Date: 2015

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 13p
• Monograph Title: TRB 94th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Daily; Flexural strength; Roughness; Test sections
• Identifier Terms: Long-Term Pavement Performance Program; Specific Pavement Studies (LTPP)
• Uncontrolled Terms: Asphalt treated permeable base; Shoulder width
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 01550540
• Record Type: Publication
• Report/Paper Numbers: 15-2142
• Files: TRIS, TRB, ATRI
• Created Date: Jan 24 2015 5:08PM