Brooklyn Tunnel (US 68)

The Brooklyn Tunnel was the first highway tunnel in the state of Kentucky, and carried U.S. Route 68 immediately north of the Brooklyn Bridge adjacent to the Kentucky River.

Cincinnati Union Terminal Tunnel

The Cincinnati, Ohio Union Terminal tunnel carries Dalton Avenue between Kenner and Hopkins Street in the Queensgate neighborhood and was completed in 1933.

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Cumberland Gap Tunnel (US 25E)

The Cumberland Gap Tunnel carries four-lanes of U.S. Route 25E under Cumberland Mountain between Kentucky and Tennessee.

John G. Huntchinson Underpass

The John G. Huntchinson Underpass carries Virginia Street West between 7th Avenue and Park Avenue under the former Chesapeake & Ohio Railroad, today known as CSX Transportation.

Nada Tunnel (KY 77)

Considered one of the best ways to enter the Red River Gorge and Clifty Wilderness areas in the Daniel Boone National Forest, the 900-foot Nada Tunnel carries Kentucky State Route 77 under the aptly named Tunnel Ridge. Open to one-lane of automobile traffic, its original purpose was for a local logging railroad.

North Shore Road and Tunnel

The North Shore Road and tunnel is an active and abandoned roadway on the north shore of Fontana Lake west of Bryson City, North Carolina. Only portions of the 34.3-mile two-lane scenic byway was ever completed in the foothills of the Great Smoky Mountains National Park. This included the last segment completed, which was a four-mile portion built between 1962 and 1970 that also included the byway's only tunnel.

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