The proposed project will be designed and conducted to provide the key components necessary to establish the Smart-Link benefits measurement system. First, an appropriate set of supporting and direct measures of systems benefits must be selected and defined. Second, detailed data requirements for calculating the selected performance measures must be identified and specified. Third, a pre-ATMS system deployment (before condition) data set must be assembled based on the specified data requirements. This before condition data set will serve at the baseline benchmark of the transportation system performance. Finally, the project will define and establish a methodology for continual updating of the required system data and benefits measurements and periodic reporting of the resulting (and continually updated) cost-benefit analyses.