TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-C02-RR: Performance Measurement Framework for Highway Capacity Decision Making explores a performance measurement framework that is designed to support the collaborative decision-making framework (CDMF) for additions to highway capacity being developed under the SHRP 2 Capacity research program. The report examines five broad areas of performance including transportation, environment, economics, community, and cost. Under these headings, the report identifies 17 performance factors, each of which are linked to key decision points in the CDMF.