November 02, 2021 Travel Advisory

Single Lane Patterns at Allegheny Tunnel, Somerset County, Begin this Evening

Caution is advised due to bi-directional traffic.

The Pennsylvania Turnpike Commission (PTC) advises motorists traveling through Somerset County to be prepared for possible delays beginning tonight, as single-lane patterns and two-way traffic go into effect at the Allegheny Tunnel, located at milepost 122.

The westbound tunnel will close  at 7 p.m., Nov. 2. This means two-way traffic will be moving inside the eastbound tunnel. This restriction will be lifted around 11 p.m. Thereafter, patterns will be shifted to close the eastbound tunnel and two-way traffic will then be moving inside the westbound tunnel. The tunnel will reopen around 7 a.m., Nov. 3.

The tunnel closure is necessary for the fire alarm contractor and AT&T to do maintenance work and inspections on the fire alarm system and antennas.

Motorists should stay alert when approaching and entering the tunnel. Drivers are urged to turn on headlights, slow down and keep an adequate distance between vehicles. Drivers should remain in their own lane and not pass in the tunnel.

If you experience car trouble and cannot safely exit the tunnel, stay in your car, put on your hazard lights and wait for assistance. Tunnel personnel will monitor closed-circuit cameras and send help for disabled vehicles.

To report an accident or other emergency on the PA Turnpike, dial *11 via mobile phone. To learn more about PA Turnpike conditions, use one of these resources:


  • 511PA Smartphone App: real-time, hands-free PA traffic advisories
  • Waze Smartphone App: real-time alerts from other drivers
  • Digital Message Signs: more than 100 boards along the Turnpike



  • 511: dial from any PA roadway for local travel information
  • Pennsylvania Turnpike Customer Assistance Center: 1-800-331-3414, Monday through Friday, 8:30 A.M. to 4:30 P.M. (Outside U.S., please call 717-831-7601)

Rosanne Placey