WHEAT RIDGE, Colo. A motorcyclist was killed in a single-vehicle crash on the eastbound Highway 58 flyover to Interstate 70 in Wheat Ridge late Friday night, according to Wheat Ridge police.Officers responded just before 10:30 p.m. and found that the rider, who was the only person involved in the crash, did not survive.Investigators said alcohol may have been a factor, and the rider was not wearing a helmet.Youngfield Street and the Highway 58 flyover were closed for several hours while the Wheat Ridge Police Department's Crash and Traffic Team investigated.The scene reopened around 3:30 a.m. Saturday.Police noted that nearly half of all motorcyclists killed in Colorado over the past five years were not wearing helmets. ...read more read less