The Infrastructure Investment and Jobs Act, also known as the  Bipartisan Infrastructure Law , of 2021 (Public Law 117-58) authorized the Secretary of Transportation to establish the Corridor Identification and Development (CID) Program. The CID Program is a comprehensive effort to fund and guide planning and project development work toward building new and enhancing existing intercity passenger rail services across the country.

The  CID Program  focuses on identifying key transportation routes or corridors that require development or improvement to facilitate economic growth, improve mobility, and enhance overall quality of life for residents and businesses.