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Laurel Hill Tunnel is one of three original Pennsylvania Turnpike tunnels which were abandoned (this one in 1964) after two massive realignment projects. The Laurel Hill Tunnel was bored under the border between Westmoreland and Somerset Counties. The others, located further east, were the Sideling Hill (Fulton County) and Rays Hill Tunnels (under the border of Fulton and Bedford Counties). All of the original tunnels except Allegheny Mountain were part of the never-completed South Pennsylvania Railroad system. Laurel Hill Tunnel is long. Its western portal is marginally visible from the current eastbound turnpike roadway at milepost 99.2. ==Bypass of Tunnel== From the Turnpike's opening in 1940 until the realignment projects, the tunnels were bottlenecks due to reduced speeds with opposing traffic in the same tubes. Four other tunnels on the Turnpike - Allegheny Mountain, Tuscarora Mountain, Kittatinny Mountain, and Blue Mountain - each had a second tube bored, as it was determined in these instances to be the less expensive option. All of the original tunnels except Allegheny Mountain were part of the never-completed South Pennsylvania Railroad system. Unlike the Sideling Hill and Rays Hill Tunnels, the Laurel Hill Tunnel is not on the bypassed section commonly known as the Abandoned Pennsylvania Turnpike, and the property is still owned by the Pennsylvania Turnpike Commission. In addition, the tunnel is not open to the public. It is routinely patrolled by the Pennsylvania State Police, who strictly enforce "no trespassing" signs.〔(【引用サイトリンク】title=Laurel Hill Tunnel Fast Facts )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Laurel Hill Tunnel」の詳細全文を読む スポンサード リンク
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