Utilization of Traffic Speed Deflectometer (TSD) 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.

Language

• English

Project

• Status: Completed
• Funding: $106,071.00
• Contract Numbers:

  SPR 748

• Sponsor Organizations:

  South Carolina Department of Transportation

  955 Park Street
  P.O. Box 191
  Columbia, SC  United States  29202-0191

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Managing Organizations:

  South Carolina Department of Transportation

  955 Park Street
  P.O. Box 191
  Columbia, SC  United States  29202-0191
• Project Managers:

  Heaps, Meredith

• Performing Organizations:

  University of South Carolina, Columbia

  502 Byrnes Building
  Columbia, SC  United States  29208
• Principal Investigators:

  Huynh, Nathan

• Start Date: 20200201
• Expected Completion Date: 20210430
• Actual Completion Date: 20210515
• Source Data: https://scdot.scltap.org/wp-content/uploads/2021/06/SPR-748-Final-Report.pdf

Subject/Index Terms

• TRT Terms: Deflectometers; Structural deterioration and defects
• Identifier Terms: Pavement Quality Index
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 01835382
• Record Type: Research project
• Source Agency: South Carolina Department of Transportation
• Contract Numbers: SPR 748
• Files: RIP, STATEDOT
• Created Date: Feb 7 2022 11:59AM