Complete and accurate data on pavement maintenance and rehabilitation (M&R) activities are crucial to the evaluation of treatment performance and the effect of maintenance and rehabilitation measures on pavement life. Since its inception, the Long Term Pavement Performance (LTPP) program has been collecting M&R data from the General Pavement Studies (GPS) and Specific Pavement Studies (SPS) test sections. This study documents the first detailed review of these M&R data elements. The report assesses the completeness and quality of the data, identifies anomalies in the data, and recommends remedial action for these anomalies.