The Pennsylvania Turnpike advises motorists traveling on the Northeastern Extension (Interstate 476) to be prepared for nighttime single-lane patterns and two-way traffic in the Lehigh Tunnel from 8 p.m. to 6 a.m. Sunday through Thursday.The restrictions are necessary to safely allow tunnel inspection and water line maintenance.

Traffic stoppages will be no more than 15 minutes in both directions to set-up a crossover pattern directing all traffic into the southbound tunnel, prior to the start of work each day.The Lehigh Tunnel is located at milepost A70-A71 between the Lehigh Valley, Exit 56, and Mahoning Valley, Exit 74, interchanges.Message boards will be activated to update motorists of any changes to the schedule caused by inclement weather or unforeseen traffic conditions. If the work is delayed, it will take place on the next available day.