One of the primary goals of the Strategic Highway Research Program (SHRP) is to collect and evaluate data that will influence revisions to current design guides. To help achieve this goal, a twenty-year Long Term Pavement Performance (LTPP) program was established. Six LTPP sites have been identified in the State of Vermont. In addition, the Vermont Agency of Transportation (VAOT) has selected two other sites for its study. The test locations all differ in traffic loading, pavement structure, and subgrade conditions. Three of the LTPP sites and both of the VAOT sites have been instrumented with moisture and temperature sensors. Groundwater wells, weigh-in-motion (WIM), and weather monitoring stations were also installed at these sites. Deflection data from falling weight deflectometers (FWD) are being obtained at each site on a regular scheduled basis. The Materials and Research Division of VAOT and the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) are assisting the LTPP study in the evaluation of these sites by monitoring seasonal soil moisture and temperature variations, pavement loading, deflections, atmospheric and groundwater conditions, and pavement performance. This paper will present the type of instrumentation used and some of the data currently available from these test sites. (A)
Abstract