Correlating M-E PDG with Vermont Conditions

The first objective of this project is to determine the current condition of the pavement life test sites used in the 2004 pavement life report. Test sites will be evaluated using a video inspection vehicle and associated International Roughness Index (IRI). The second objective of the research will be to compare the results gathered in objective one with the modeled results of the M-E PDG software. By comparing the in-situ values with the software output, a calibration (or verification) will be conducted to see if any adjustment is needed for Vermont conditions. Both rutting and IRI will be compared at the present day values, and their values over time. The third and final objective of the study is to document what adjustment factors, if any, should be implemented in Vermont pavement design. These will be used to accurately predict distresses over time in pavement throughout Vermont. Since the approval of funding in January 2009, the files from the 2004 layer coefficient study were examined to determine which 16 project sites would be most useful for analysis. Additionally, steps were taken to obtain historical traffic and pavement condition data from these sites. An NETC study relating to this project was found, and communication has been initiated into how working together can benefit both projects.