I was driving through a school zone on 6400 West at about 4200 South. I slowed down to the 20 mph and began to slow to a stop as I saw a group of kids and the crossing guard at the corner about to start crossing the street, when the idiot in a white Dodge Ram came up behind me, swerved into the shoulder and up on the curb and flew passed me, going at least 45 mph. Thankfully the crossing guard saw this clowns stupidity and waited. The truck continued to speed off going at least 70 down a road where the speed limit is 35. Flew through the stop sign ahead and kept racing away with no regard for safety or anyone else on the road.