The Pennsylvania Turnpike estimates 5.8 million Fourth of July travelers will use its roadway system, and the Fridays before and after the holiday will be the busiest.
The Turnpike expects 750,000 vehicles to travel its system on Friday, June 29 and 700,000 travelers on Friday, July 6.
Friday afternoons are likely to be peak travel times.
Tuesday, July 3 and Thursday, July 5 could be nearly as busy, with 650,000 vehicles anticipated each day.
Pennsylvania State Police assigned to the turnpike will have additional patrols on duty.
The Turnpike will suspend maintenance and construction work and have all available lanes open between Friday, June 29 and Sunday, July 8.
The exception is the Delaware River Bridge Exit in Bucks County, where the westbound right lane will be closed from 8 p.m. on June 29 through 10 a.m. on July 1 for tolling equipment maintenance.