The East Side Access project is building a LIRR spur to Grand Central Terminal that will run in part via the lower level of the existing 63rd Street Tunnel. The East Side Access project will add a new eight-track terminal underneath the existing Grand Central Terminal. The project was first proposed in the 1968 Program for Action, but due to various funding shortfalls, construction did not start until 2007. , the project was expected to cost $11.1 billion and was tentatively scheduled to start service in December 2022.