The Pennsylvania Turnpike Commission advises motorists traveling on the Northeastern Extension (I-476) between the Lehigh Valley (Exit #56) and Mahoning Valley (Exit #74) interchanges, to be prepared for continuous single-lane patterns and two-way traffic in the northbound Lehigh Tunnel starting tonight through Thursday at 6 a.m.

Motorists traveling on I-476 should stay alert when entering the tunnel and turn on their headlights. Drivers are also advised to slow down, keep an adequate distance from the vehicle ahead and never pass inside the tunnel. Customers who experience car trouble and cannot safely exit the tunnel should stay in the car, put on the hazard lights and wait for assistance. Tunnel personnel will monitor closed-circuit cameras and send help for disabled vehicles.

Travelers are urged to stay alert and be prepared for slow moving construction vehicles or stopped traffic approaching the entrance to the Lehigh Tunnel and obey the posted speed limits through the work zone. Message boards will be activated to update motorists of any changes to the schedule caused by inclement weather or unforeseen traffic conditions.