The Pennsylvania Turnpike Commission advises motorists traveling on the Northeastern Extension (I-476) to be prepared for daytime single-lane patterns and two-way traffic in the southbound Lehigh Tunnel between 8 a.m. and 2 p.m. Monday to Wednesday for tunnel maintenance.

Each day between 7:30 and 8 a.m., crews will implement a brief traffic stoppage in both directions to set-up a crossover pattern directing all traffic into the southbound tunnel.By 8 a.m. the northbound tunnel will be closed and traffic diverted.Message boards will be activated to update motorists of any changes caused by inclement weather or unforeseen traffic conditions. If work is delayed, it will take place on the next available day.