TRB’s National Cooperative Highway Research Program (NCHRP) Research Results Digest 316: Using Surface Energy Measurements to Select Materials for Asphalt Pavements summarizes an investigation of the effectiveness and practicality of surface energy measurement as a tool for routine screening and selection of materials for optimum performance of hot-mix asphalt pavements. The summary also includes information on three proposed test methods for determining surface energy. The complete final report of the investigation has been published as NCHRP Web-Only Document 104.