Commuter Rail: Potential Impacts and Cost Estimates for the Cancelled Hudson River Tunnel Project

As requested, this report addresses the following questions: (1) What did major planning studies find would have been the estimated mobility, economic, and environmental impacts of the ARC project? (2) What have been the ARC project cost estimates over time, who developed those estimates, and what sources of funding were identified? (3) How, if at all, did documents prepared as part of FTA’s New Starts funding process address potential cost growth for the ARC project?