In the current environment of austerity and fiscal constraints, planners, engineers and decision-makers face increasing needs to assess the wider economic benefits stemming from transportation infrastructure investments, in order to improve decisions regarding project selection and project prioritization. Using tools that are readily available at the state level, such as travel demand models along with the open-source SHRP2 Capacity Project C11 tools, planners and engineers can proceed with an informed statewide assessment of investment projects that yield benefits in the areas of market size expansion, travel time reliability and connectivity. In this paper, we propose a 7-level framework of integrating a travel demand model with the SHRP2 C11 tools and showcase its functionality using the Inter-County Connector (ICC) in Maryland as a case study. The estimation results suggest that, in the year 2030, a total increase of approximately 6% in buyer-supplier market accessibility will be achieved in the counties surrounding ICC, due to the new construction, and all three corridors that are parallel to ICC and serve similar OD pairs will experience a decrease in recurring and incident delay and related costs that can be attributed to ICC. In dollar terms, the value of the total benefits from ICC construction in the year 2030 would amount to approximately $1.3 billion, compared to the no-build scenario.