Fort McHenry Tunnel
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Southbound tunnel, Bore 2
|Opened||November 23, 1985|
|Owner||Maryland Transportation Authority|
|Vehicles per day||115,000|
|Length||1.5 miles (2.4 km)|
|Number of lanes||8 lanes in 4 tubes|
|Operating speed||55 miles per hour (89 km/h)|
|Lowest elevation||107 feet (33 m) below harbor water surface|
|Tunnel clearance||13.6 feet (4.1 m)|
|Width||26 feet (7.9 m)|
The Fort McHenry Tunnel is a four-tube, bi-directional tunnel that carries traffic on Interstate 95 underneath the Baltimore Harbor. The lowest point in the Interstate System under water, the tunnel is named for nearby Fort McHenry.
The tunnel, which opened on November 23, 1985, closed a gap in I-95 between Maine and Florida. At the time of its opening it was the most expensive underwater tunnel project in the United States, but that figure has since been surpassed by the Big Dig project in Boston.
The Fort McHenry Tunnel was constructed from June 1980 to November 1985, at a cost of about $750 million. The tunnel's annual traffic in 2009 was 43.4 million vehicles. As of July 1, 2013, the toll rate for cars is $4.00, paid in either direction. Vehicles with more than two axles pay additional amounts, up to $30.00 for six axles.
Design and construction
The Fort McHenry Tunnel was opened on time and under its budget, and it continues to be a vital transportation link in the Mid-Atlantic region. Soon after the Fort McHenry Tunnel opened, the nearby Baltimore Harbor Tunnel, which had opened to traffic in 1957, was extensively rehabilitated.
|Wikimedia Commons has media related to Fort McHenry Tunnel.|
- Fort McHenry Tunnel - history and technical info by Roads to the Future