A bridge replacement will close a long section of the Pennsylvania Turnpike's Northeastern Extension later this month, a project likely to have a ripple effect on traffic in the region.
Officials are asking motorists to change travel plans or expect long detours.
The fast replacement system will result in a new span over Crackersport Road outside Allentown.
The existing 131-foot bridge on Interstate 476 opened in 1957 and carries about 30,000 vehicles daily.
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The work should last 55 hours, starting at 9 p.m. on Friday, Oct. 13, and running through 4 a.m. on Monday, Oct. 16.
Information on the project and detour maps are posted on the turnpike's website.