For the second time this winter Pennsylvania State Police are investigating a fatal accident in northwest PA involving a Penndot plow.

A pedestrian was hit by a plow and killed in Crawford County in early December.

In Erie County this past weekend, a Jeep Cherokee SUV collided with a Penndot plow, claiming the life of the Jeep's driver.

The circumstances were different in each tragedy, but state police say both are reminders to be careful around plow trucks.

We've learned that the weekend incident involved more than one plow, and near white-out conditions according to PSP Troop E Captain Kirk Reese.

As we reported Saturday, 74-year-old Thomas Dedinsky of Ripley, NY lost his life when his vehicle crashed into a Penndot plow truck on Route 89 in Greenfield Township.

Captain Reese said the northbound Jeep hit the second of two plows working in tandem southbound on Route 89.

Investigators said blowing snow made it difficult for the drivers to see, causing the second plow operator to hit his brakes, right before the approaching car made impact.  Witnesses told police they heard the crash, but really didn't see it because of blowing snow coming from an open field to the west.

Captain Reese said during these winter months drivers need to give the plows room along the center line to operate, and slow down when visibility is poor. "The biggest thing give them space, and that's what they all ask for everyone to do. And secondly, just on the roadway with the blowing snow whether they're plowing not plowing with all the open fields we have in the area, when visibility is reduced, reduce your speed. If you can't see, pull off the to side when you can but you've got to slow down and be patient on these roadways," Capt. Reese said.

Troopers and an accident reconstruction team are finalizing their investigation.

Meantime, the investigation is complete in the plow accident in West Mead Township Crawford County that claimed the life of a 19-year-old female pedestrian December 6th. After investigators consulted with the district attorney, no charges are expected.  The woman was walking on the shoulder of Route 27 in dark clothing the night of the accident, and was killed instantly by the plow blade.

Captain Reese said if you are walking at night, wear bright or reflective clothing or carry a flashlight so it's easier for a plow operator or any driver to see you.