A study was undertaken by Pennsylvania Transportation Institute and sponsored by Pennsylvania Department of Transportation to evaluate performance of several asphalt concrete pavements through close field monitoring. These pavements have been in service for several years. This paper deals with two of the nine constructed projects. Materials were collected from field and materials characterization testing was performed in the laboratory. Pavement distress survey and performance measurements of all the project pavement sections were conducted. Laboratory material characterization testing was also conducted on material from pavement cores drilled from several of these projects. The data was analyzed to evaluate the relationship between the laboratory characterization results and the actual measured performance of these projects in the field. Laboratory testing included evaluation of rut resistance properties and evaluation of resistance of thermal cracking. Field investigation included distress mapping, quantifying crack length, and measuring magnitude of rutting.