A slow moving superload will be coming through portions of Butler and surrounding counties Tuesday.
The superload will be traveling on I-80 Eastbound in portions of Mercer, Butler, Clarion, and Allegheny Counties among others.
PennDOT officials say the superload is 136 feet long, nearly 28 feet wide and weighs 150 tons.
Drivers on I-80 should expect delays as it will move as a rolling slowdown using two lanes.