Why Pennsylvania Keeps Abandoning Tunnels
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The Pennsylvania Turnpike has a long history of bypassing and abandoning its original narrow tunnels—such as Laurel Hill, Ray Hill, and Sidling Hill—due to traffic bottlenecks and high maintenance costs. The Turnpike Commission is now planning a massive $500 million highway excavation known as the "gray cut" to bypass the Allegheny Mountain Tunnel, citing safety improvements, reduced crash rates, and lower costs compared to boring a new tunnel. While opponents argue the mountain cut is an unnecessary destruction of landscape, proponents emphasize that an open-air pass will eliminate traffic restrictions for hazardous loads and prevent major emergency incidents like a recent vehicle fire inside the aging tunnel.