A road improvement project for a portion of Interstate 99 in Centre County will resume on Monday, according to the Pennsylvania Department of Transportation.

The project is intended to improve ride quality and extend the life of 2.5 miles of roadway in Spring Township.

A long-term closure of the passing lane on I-99 northbound between the Harrison Road interchange near mile marker 80 and the on ramp for I-80 eastbound at Bellefonte will be in place beginning Monday. PennDOT expects the closure to remain in effect until mid-July while the contractor completes excavation at the bridges, paves, installs new guiderail and conducts drainage improvements.

Traffic will shift onto the passing lane once that work is complete, and the contractor will begin work on the travel lane.

PennDOT will issue an update before the start of overnight work later this month.

Crews also will be applying pavement markings on I-99 southbound between the I-80 eastbound off-ramp at Bellefonte and the Pleasant Gap interchange near mile marker 81.

Overall work on the $4.6 million project consists of resurfacing, restoring and rehabilitating the roadway surface, installing guide rail, marking pavement and miscellaneous construction.

PennDOT anticipates completion by September.

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