Verification of Traffic Speed Deflection Devices’ (TSDDs) Measurements

Traffic Speed Deflection Devices (TSDDs) that measure surface deflection at traffic speeds are used by several highway agencies in the United States and other countries to provide data to help with management of the highway network. For example, these data can be used for assessment of pavement structural condition, selection of pavement treatments, and other purposes. In comparison with traditional pavement deflection measurement (e.g., falling weight deflectometers), TSDDs provide a means for acquiring extensive amounts of data in a short period of time. However, the data obtained from TSDD measurements are influenced by many factors such as pavement type, pavement structure, climatic conditions, and speed of operation. Recognizing that no widely accepted practices for verifying the measurements obtained by TSDDs is currently available, research is needed to identify the deflection measurements that are required for pavement structural assessment and other applications and develop a procedure for verifying TSDD measurements and also to develop a recommended standard practice for implementing this procedure. The objective of this research is to develop a recommended standard practice for verification of the measurements obtained by TSDDs on highway pavements for consideration and adoption by AASHTO.  


  • English


  • Status: Proposed
  • Funding: $400000
  • Contract Numbers:

    Project 10-105

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Hanna, Amir

  • Start Date: 20200421
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01707641
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 10-105
  • Files: TRB, RiP
  • Created Date: Jun 3 2019 3:17PM