CANOGA PARK _ A 52-year-old motorcyclist was killed at dawn today in a collision with a big-rig at Vanowen and Variel streets, officials said. Witnesses told police the unidentified motorcylist, who was wearing a helmet, was eastbound on Vanowen Street about 5:50 a.m. when he collided with a westbound semi tractor-trailer that was turning left onto Variel, said Brian Humphrey, spokesman for the Los Angeles City Fire Department. The motorcyclist suffered massive head and facial trauma and was pronounced dead at the scene, Humphrey said. AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREOregon Ducks football players get stuck on Disney ride during Rose Bowl event160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!