Equipment For Collecting Traffic Load Data PDF Download

The GDOT is preparing for implementation of the Mechanistic-Empirical Pavement Design Guide (MEPDG). As part of this preparation, a statewide traffic load spectra program is being developed for gathering truck axle loading data. This final report presents the results of a comprehensive research effort that culminated in recommendations for a statewide Traffic Load Spectra Program for collecting and processing truck axle loading data to support MEPDG implementation in Georgia. The recommendations include an optimal axle loading data collection plan that balances pavement design data needs, cost and number of WIM sites, and types of equipment used in obtaining the data. The report also shows how the available GDOT traffic data and other applicable data resources were used to develop traffic loading inputs and defaults to support local calibration of MEPDG models in Georgia. The available axle loading data were analyzed and the interim traffic loading defaults were developed for different groups of roads designed and maintained by GDOT, along with the recommendations for future updates of the defaults. In addition, user guidelines, decision trees, and software tools were developed to facilitate using the traffic loading defaults in MEPDG applications