Utilization of Traffic Speed Deflectometer for Pavement Management

This project investigated how the Traffic Speed Deflectometer (TSD) data the South Carolina Department of Transportation (SCDOT) obtained as part of the pooled fund studies (i.e., TPF-5(282) and 5(385)) can be used to improve the selection of candidate projects for rehabilitation. The analysis using approximately 950 miles of TSD data collected on eight SC primary routes indicated that there is a low correlation between Structural Condition Index (SCI) and Pavement Quality Index (PQI). This finding confirmed prior knowledge that PQI does not accurately portray the pavement’s underlying conditions related to remaining service life or the potential for future deterioration. The SCI₁₂ performance indicator was selected to quantify the structural condition of a pavement, where good pavements are those with SCI₁₂ values below 1.6, fair are those with SCI₁₂ values between 1.6 and 3.3, and poor are those with SCI₁₂ values above 3.3. A TSD score was developed using the percentages of poor pavements to assist the SCDOT with candidate project selection. This TSD score can be easily incorporated into the current workflow of project selection with the implemented Excel-based tool.

• Record URL:
  https://scdot.scltap.org/wp-content/uploads/2021/06/SPR-748-Final-Report.pdf
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/56375
• Corporate Authors:

  University of South Carolina, Columbia

  Department of Civil and Environmental Engineering, 300 South Main Street
  Columbia, SC  United States  29208

  South Carolina Department of Transportation

  Office of Materials and Research
  1406 Shop Road
  Columbia, SC  United States  29201

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Huynh, Nathan
  • 0000-0002-4605-5651
  • Gassman, Sarah
  • Mullen, Robert
  • Pierce, Charles
  • Chen, Yuche
  • Ahmed, Nazmus
• Publication Date: 2021-5-18

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Maps; Photos; References; Tables;
• Pagination: 182p

Subject/Index Terms

• TRT Terms: Data analysis; Deflectometers; Pavement maintenance; Pavement management systems; Rehabilitation; Structural analysis; Traffic speed
• Geographic Terms: South Carolina
• Subject Areas: Data and Information Technology; Highways; Maintenance and Preservation; Pavements; Planning and Forecasting;

Filing Info

• Accession Number: 01774774
• Record Type: Publication
• Report/Paper Numbers: FHWA-SC-21-04
• Contract Numbers: SPR No. 748
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Jun 23 2021 2:35PM