It happened on I-70 in Somerset Township around 5:15 p.m. State police say the roadways were covered with snow from a sudden winter storm at the time.
According to state police, a Lincoln-Continental town car and a tractor trailer were traveling westbound in the left lane of I-70. Both vehicles were going about 60 mph.
The driver of the town car reportedly lost control of the vehicle and struck a concrete barrier, causing the vehicle to spin out into the road. The tractor trailer then struck the car on its passenger side.
Both the car and the tractor trailer went off the road, crashed through a guide rail and went down an embankment into a ditch. The tractor trailer flipped over onto its passenger side in the crash.