Heavy lake-effect snow and ice created hazardous road conditions Saturday, causing several snow-related accidents around Mercer County.

A tractor-trailer loaded with meat turned on its side at 4:30 a.m. Saturday on the ramp from state Route 60 to Interstate 80, Shenango Township, while making a sharp turn, state police said.

Though the load didn't spill, driver Lawrence T. Liptak, 57, of Lowellville, Ohio, suffered minor injuries, police said. Traffic had to be detoured around the wreck, police said.

According to PennDOT, road crews were sent around the county before the snow began falling at 2:30 p.m. Saturday.

"We knew it was coming and we had all the equipment possible en route," said Ken Pochatko, assistant manager of PennDOT in Mercer County.

PennDOT crews worked non-stop Saturday through midnight and had roads cleared by Sunday morning, he said. The interstates were the top priority and heavy traffic helped clear the roads faster, he added.

PennDOT officials anticipated more accidents from the snowstorm, though there were plenty of fender benders.

Lenid Gertzenstein of Youngstown lost control of his westbound car at 7 p.m. on Interstate 80, Findley Township, state police said. He went off the road and hit a tree because of the snow-covered highway, but wasn't hurt, police said.

Allen P. Leibling, of 11 Forest Glen Drive, Grove City, rolled his sport utility vehicle into the woods off of icy Interstate 79 in Springfield Township after he lost control of the SUV at 7:05 p.m., state police said. He wasn't injured.

Slushy roads caused Daniel T. Edgar of Erie to lose control of his pickup at 2:45 p.m. and hit a bridge barrier while northbound on Interstate 79, Findley Township, state police said. Neither he nor his passenger were injured. In a two-vehicle crash on Interstate 80 in Shenango Township no one was injured when Angela M. Chambliss, Cleveland, lost control of her car and collided with a sport utility vehicle driven by Ruth Ann Spiering, Bloomington, Ind., police said.

Two weather-related crashes on highways in eastern Pennsylvania on Sunday each involved about 50 vehicles, causing immense traffic delays but no major injuries, police said. Both crashes followed sudden bursts of snow that obscured visibility, police and witnesses said.

"It was pretty bad visibility, and then it started freezing up on the bridge, and that's what caused all the wrecks, I guess," said Roy Weinstein, one of the motorists involved in the crash on Interstate 78 west of Allentown.

On Interstate 80 in Luzerne County on Sunday, police blamed a snow squall, sudden whiteout conditions and black ice for a similar crash. Police said traffic was backed up for 23 miles following the crash that happened shortly before 10 a.m.; traffic did not return to normal flow until about 6 p.m. and about 15 state troopers were needed to direct traffic.

The Associated Press contributed to this report.