WASHINGTON — State police say a tanker truck driver apparently blacked out after sneezing causing the vehicle to overturn, spilling corn syrup that blocked Interstate 70 in southwestern Pennsylvania, and snarled traffic on nearby Interstate 79.

Troopers say 52-year-old Billie Setser of Carrollton, Ohio, was eastbound on I-70 near Washington when he lost control of the rig about 2 p.m. Thursday. The truck went off the road, hit an embankment, rolled onto its side and slid, blocking both eastbound lanes.

Crews collected several hundred gallons of corn syrup in metal drums, as PennDOT workers put down anti-skid material.

Eastbound traffic backed up about 13 miles. Interstate 79 had southbound traffic back up eight miles.