The Pennsylvania Turnpike advises motorists traveling on the Northeastern Extension (I-476) to be prepared for daytime single-lane patterns and two-way traffic in the Lehigh Tunnel from 8 a.m. to 2 p.m. Tuesday for tunnel maintenance, including updating overhead lighting.

From 7:30 to 8 a.m., Turnpike maintenance crews will implement a 15-minute traffic stoppage in both directions to set up a crossover pattern directing all traffic into the northbound tunnel.

By 8 a.m., the southbound tunnel will be closed and all traffic diverted into the northbound tunnel until 2 p.m. when the patterns are lifted.

The Lehigh Tunnel is located at milepost A70-A71 between the Lehigh Valley, Exit 56, and Mahoning Valley, Exit 74.

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.