Allegheny Mountain Tunnel PA
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Description: The Allegheny Mountain Tunnel is a crucial vehicular passageway located in Pennsylvania, serving as a key component of the Pennsylvania Turnpike. Opened in 1940, this tunnel cuts through the Allegheny Mountains, facilitating smoother and more direct travel across the rugged terrain. Spanning approximately 6,070 feet, it was one of the first long tunnels in the United States designed specifically for automobile traffic. The tunnel has undergone various upgrades and maintenance efforts over the years to ensure safety and efficiency for the millions of vehicles that pass through annually. Its construction marked a significant engineering achievement of its time, contributing to the development of modern highway systems in the United States.