By Elsa Partan
Laramie, WY – The crash on I-80 that killed three members of a prominent Denver family Saturday began when their car rear-ended a snowplow.
At first, investigators did not know what made the Parr family vehicle to go out of control, but now they say it's clear that the station wagon first slammed into the snowplow, triggering the five-vehicle collision.
Only one member of the Parr family survived the crash.
The Department of Transportation's Dave Kingham says snowplows can become nearly invisible as they kick up big clouds of snow around them.
Kingham says snowplows only travel at 35 to 45 miles per hour, so it's important to slow down when you see one ahead. 21 WYDOT snowplows were hit by other vehicles last winter costing the state nearly $45,000 in damage to the plows.