Washington: Re “Amtrak proves Amtrak wrong” (editorial, March 29): The work that Amtrak is doing at night and on weekends in the 110-year-old North River Tunnel is only maintenance in one section designed to keep the tunnel running and immediately reduce delays. It is not the full rehabilitation of the tunnel, so it lasts another century, that is necessary as part of the full Hudson Tunnel Project under the Gateway Program.