Hours adjusted for resurfacing project on I-81 in Cumberland County: PennDOT Updated 9:05 PM; Today 9:05 PM Due to increasing traffic volumes, work hours now will be from 8 p.m. to 6 a.m. Sunday night through Friday morning. Facebook Share The Pennsylvania Department of Transportation (PennDOT) announced today that work hours have been adjusted for a 12.3-mile resurfacing project on Interstate 81 in Cumberland County. The contractor has been working weekly throughout the project limits from 6 p.m. to 6 a.m. weeknights, according to a press release. Lane closures not to exceed four miles in length are implemented during work hours. Due to increasing traffic volumes, work hours now will be from 8 p.m. to 6 a.m. Sunday night through Friday morning.