A portion of I-79 is shut down due to a tractor trailer accident.
PennDOT officials say the northbound lanes are closed in between the Portersville exit (Exit 96) and the Butler/New Castle exit to Route 422.
The accident happened around 10:30 a.m. in the northbound lane near milemarker 98 when a tractor trailer jackknifed on the highway.
PennDOT officials are hopeful the road could reopen by 1 p.m.
Drivers can use Route 19 as a detour in the area.