Fort McHenry Tunnel Baltimore Northbound

The Fort McHenry Tunnel is a four-tube, bi-directional tunnel that carries traffic on Interstate 95 (I-95) underneath the Baltimore Harbor. The lowest point in the Interstate System under water,[1] the tunnel is named for nearby Fort McHenry.
The tunnel was constructed from May 1980 to November 1985, at a cost of about $750 million. At the time of its opening on November 23, 1985, it was the most expensive underwater tunnel project in the United States, a record it held until being surpassed by the Big Dig project in Boston.