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 through 6 a.m. Thursday.

Drivers should slow down and keep an adequate distance from the vehicle ahead.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.