Abandoned Tunnels & Area at Pennsylvania Turnpike
The history of the abandoned tunnels is connected to the South Pennsylvania Railroad, which was originally conceived in the late 19th century: [5]
South Pennsylvania Railroad
The railroad was intended to connect Pittsburgh and Harrisburg, but was never completed due to financial difficulties and competition from the Pennsylvania Railroad. [5]
Pennsylvania Turnpike
The Pennsylvania Turnpike Commission repurposed the tunnels for a new highway project in the 1930s. The turnpike opened in 1940 and was the first superhighway in the United States. [5]
Bypass
In the 1960s, a study recommended bypassing the tunnels to ease traffic congestion. The Sideling Hill By-pass opened in 1968, and the tunnels were put out of service. [1]
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