Equipment selection and site installation for LTPP SPS WIM sites
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Equipment selection and site installation for LTPP SPS WIM sites

Filetype[PDF-83.76 KB]


  • English
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    Details:

    • Corporate Creators:
      United States. Federal Highway Administration
    • Subject/TRT Terms:
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      United States
    • TRIS Online Accession Number:
      00811904
    • Corporate Publisher:
      United States. Federal Highway Administration
    • Abstract:
      The Long-Term Pavement Performance Program (LTPP) has intensified its efforts to obtain sufficient quantities of research quality loading data at a number of Specific Pavement Studies (SPS) sites. As one part of this effort, the Federal Highway Administration (FHWA) has consulted with the Transportation Research Board LTPP Traffic Expert Task Group for a recommendation for equipment with a significant field history of reliable, low variability, continuous operations. LTPP acknowledges that more than one technology may be capable of achieving the specified performance, however, as with all other LTPP equipment protocols, a single package of sensors, software and pavement performance requirements has been selected as the basis of a set of model specifications. The model specifications are for high-speed bending plate weigh-in-motion (WIM) in a portland cement concrete slab 300 feet long. Installed equipment is expected to meet ASTM E-1318 tolerances for Type I equipment based on axle weights, gross vehicle weights, speeds and axle spacings. A separate smoothness specification has been developed which is partially referenced by incorporation in the grinding criteria for pavements. The details on the verification of scale performance are in a separate document. The specifications are provided as if they were actual contract documents. They are divided into two parts: a hardware and software package, and installation procedures including two options for a portland cement concrete slab.
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