6. The Thomas P. O’Neill, Jr. Tunnel also makes the list. This tunnel is located in Boston, Massachusetts and carries traffic from a multitude of roadways including; I-93, US 1, and Route 3. The tunnel is 1.5 miles in length, and 4 lanes in width. It was opened to traffic in 2003, and those passing through do so at a limit of 45 mph.

7. The Lincoln Tunnel is a 1.5 mile long tunnel which passes under the Hudson River between Manhattan, New York and Weehawken, New Jersey. This tunnel was created from Route 495 and NY 495. This tunnel is unique in that it routes three separate tubes; Center, North, and South. These tunnel tubes opened in 1937, 1945, and 1957 – respectively. An average of 108,655 vehicles pass through this tunnel on a daily basis.

8. Baltimore Harbor Tunnel is 1.45 miles in length and is located in Baltimore, Maryland. The tunnel opened in 1957, and it carries 4 lanes of traffic from I-895. It crosses the Patapsco River, and costs $3 to pass through.

9. The Hampton Roads Bridge-Tunnel is 3.5 miles in length, and is located between Norfolk and Hampton, Virginia. The bridge-tunnel carries 4 lanes of traffic from I-64 and US 60. It was opened in 1957 to westbound traffic, and in 1976 to eastbound traffic.

10. Fort McHenry Tunnel is located in Baltimore Harbor, and routes I-95. This tunnel is 1.5 miles in length, and houses 8 lanes of traffic in 4 different tubes. The speed limit in the Fort McHenry Tunnel is 55 mph, and the toll to pass through is $3.00. The tunnel was opened to the public in 1985.

A Sightseer’s Guide To Engineering 
Road Tunnels in The United States