Fort McHenry Tunnel

The largest underwater highway tunnel, as well as the widest vehicular tunnel ever built by the immersed-tube method, the Fort McHenry Tunnel opened to traffic in November 1985. The eight-lane tunnel is nearly 1.7-miles long and connects the Locust Point and Canton areas of Baltimore, crossing under the Patapsco River, just south of historic Fort McHenry. The tunnel is a vital link in I-95, the East Coast's most important interstate route. Including the tunnel and approach roadways, the facility is approximately 13.3 miles in length.