Laurel Hill Tunnel

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Laurel Hill Tunnel
Laurel Hill Tunnel 1942.jpg
Laurel Hill Tunnel in 1942
LineSouth Penn abandoned
LocationLaurel Hill
Westmoreland and Somerset counties, Pennsylvania
Coordinates40°6′0.4″N 79°13′38.4″W / 40.100111°N 79.227333°W / 40.100111; -79.227333Coordinates: 40°6′0.4″N 79°13′38.4″W / 40.100111°N 79.227333°W / 40.100111; -79.227333
StatusClosed to traffic, leased to Chip Ganassi Racing for testing
CrossesLaurel Hill
Work begun1881, railway
1938, highway
Constructed1881–1885, railway
1938–1940, highway
OpenedOctober 1, 1940
ClosedOctober 30, 1964, I-70/I-80S
OwnerPennsylvania Turnpike Commission
Length5,450 ft (1,660 m), railway
4,541 ft (1,384 m), highway
No. of lanes2

Laurel Hill Tunnel is one of three original tunnels on the Pennsylvania Turnpike 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 4,541 feet (1,384 m) long. Its western portal is marginally visible from the current eastbound turnpike roadway at milepost 99.3.


The point eastbound where the turnpike bypasses the Laurel Hill Tunnel to the left (north). The abandoned tunnel can be seen where there is a path of trees removed from the top of the mountain. Notice the jersey barriers end with the beginning of a wide grassy median.

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.[1]

The stretch of the highway that bypasses Laurel Hill Tunnel climbs to the Turnpike's highest elevation (2,603 feet) at Mile 100.45, just within the border of Somerset County.

Testing use[edit]

The tunnel was used by Chip Ganassi Racing for high-speed race car aerodynamic testing. The tunnel has been repaved, equipped with climate control, safety equipment, and data collection systems. The tunnel was first used for testing in 2004 to develop the G-Force Indycar.[2][3]


  1. ^ "Abandoned Turnpike FAQ". Retrieved September 24, 2016.
  2. ^ "The Secrets of Laurel Hill Revealed". Retrieved October 4, 2014.
  3. ^ "The Secret Racing Test Tunnel No One Wants to Talk About". Road and Track. Retrieved January 11, 2015.