A crash is slowing traffic on Interstate 81 at the Dauphin and Lebanon county line.
The crash is at mile marker 82, two miles north of the exit for Grantville and Hershey and three miles south of the Annville and Fort Indiantown Gap exit.
A 911 dispatcher said at least one vehicle overturned and is in the median.
A PennDOT traffic camera shows northbound traffic backed up at mile marker 80.
Southbound traffic is also affected in the area.