Advocacy group pushes rail, auto for tunnel across Long Island Sound Newsday » Gov. Andrew Cuomo is advocating for a tunnel across Long Island Sound, which a recent state report estimated would cost between $31.5 billion and $55.4 billion. The Regional Plan Association says the tunnel should accommodate trains and automobiles, but the state report does not mention trains. Michelle2018-03-05T12:24:33-08:00February 14th, 2018|New York, Rail, Roads|