By Joe Wessels

CINCINNATI (Reuters) - One woman was killed on Monday and dozens of people injured in a 76-vehicle pileup on an icy Ohio highway, one of three major crashes that clogged roadways across the state, authorities said.

Sixty cars and 16 tractor trailers slammed into one another on Interstate 275 near Cincinnati just after 11:35 a.m., said Hamilton County Sheriff's spokesman Jim Knapp.

"Eighteen years on patrol, and I've never seen anything like it," he said.

At least 20 people were transported to local hospitals with undetermined injuries, said Colerain Township Fire Captain Darian Edwards, who described "dozens of walking wounded" being tended to at the crash site.

Authorities believe the woman, whose name has not been released, had exited her car to investigate an initial crash and may have been struck by another car, Knapp said.

In a second crash Monday on Interstate 75, 50 cars collided, causing an undetermined number of injuries but no reports of fatalities, said Ohio State Police Lieutenant Steve Mahl. The crash took place in an area between Middletown and Monroe, in the southwestern part of the state

A third crash near Mansfield, in the north-central part of the state, caused a 13-car pileup on U.S. Highway 71, Mahl said, adding that only minor injuries had been reported in that crash.

All across Ohio on Monday, drivers have been contending with ice, periods of whiteout, and snow-covered and slippery roadways, said Mahl. "It's typical winter weather out here."

(Reporting By Joe Wessel and Chris Francescani; Editing by Mary Wisniewski and Eric Beech)