Mapleton police traffic stop ends with crash by young driver Mapleton Police Department and last updated 2021-05-25 16:40:08-04 MAPLETON, Utah â Mapleton police tried to stop a speeding car Monday night, but the chase ended when the vehicle crashed into a concrete barrier in a construction zone, with the young driver claiming he was attempting to take his own life. An officer was patrolling for speeding violations on Main Street in Mapleton when he spotted a car going 70 mph in a 30 mph zone. Attempts to make a traffic stop were discontinued after the vehicle almost collided with a second officer and nearly hit another vehicle on the road, as they feared a chase would pose a threat to public safety.