Suppose your vehicle had a frosted-up windshield one cold winter morning. And let's suppose you were in a big hurry - no time to scrape that windshield - so you hopped in and drove away, peering through the defrosted "peep hole."
(I know what you're saying. C'mon! Something like that could never happen!)
Furthermore, let's suppose that you were stopped in that frosted-up vehicle, near the railroad track... and suddenly the train was coming! Oh, no! Gotta do something! But due to your frosted-up windshield, you failed to notice the guy on the bike, directly in front of you. As you stomp on the gas, you hear a crunch - you know you hit something! But, the train's a-comin' - you gotta get out of the way!
Apparently, that is exactly what happened to Maria Fregoso-Avina, down in Provo, Utah.