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Federal Highway Administration Research and Technology
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Publication Number: FHWA-RD-01-169
Date: October 2005

Rehabilitation of Jointed Portland Cement Concrete Pavements: SPS-6, Initial Evaluation and Analysis

FIGURE 2 LTPP data collection and data movement flowchart.

  • LEVEL E DATA - Release to public [IMS Database (National)]
  • Data uploaded into IMS [IMS Database (National)]
  • Manual data upgrades by Regions if appropriate
  • Series of data-specific QC programs executed on data files
  • Data Loaded Into RIMS
  • DEFLECTION DATA - Collected with FWD
    • Data files sent to Regional Offices
    • QC using FWD SCAN - Data may be edited
  • LONGITUDINAL PROFILE - Collected with Profilometer
    • Field Control by checking on IRI variability
    • Data files sent to Regional Offices
    • PROFCHK: Recompute profile parameters & QC
    • By Dipstick®
      • QC using PROFCHK by the Regions
      • Some profiles may be eliminated
    • With Film
      • Data analyzed & electronically stored
      • Data files sent to Regional Offices
    • Manually
      • Review & enter data by Regional Offices
    • Photographically
      • Data files sent to Regional Offices
  • MATERIALS DATA - Field & Laboratory Tests
    • Coring & sampling
      • Testing by LTPP
      • Testing by State agencies
    • In situ field testing
      • Test data/forms forwarded to Regional Offices
      • Review & convert data into Machine-readable form
  • TRAFFIC DATA - Collected by WIM & AVC
    • Data entered into Regional Traffic Database
    • Perform QC & flag data
    • All data
      • Central Traffic Database
    • Acceptable data
      • Compute summary statistics
  • CLIMATIC DATA - Collected at AWS
    • Data downloaded by modem or during site visit
    • AWS CHECK to review data
    • Data checked & extracted


  • AVC = Automatic Vehicle Classification
  • FWD = Falling-Weight Deflectometer
  • IRI = International Roughness Index
  • AWS = Automated Weather Station
  • WIM = Weigh-in-Motion
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