A motorcyclist has died after witnesses say the bike hit a tractor trailer.The accident occurred on the 5100 block of Sloane Road shortly after 1:00 Monday afternoon. Witnesses told police the motorcycle was traveling eastbound on Sloane when it struck the cab of a tractor trailer that was turning southbound. The motorcyclist was pronounced dead at the scene. It is unknown if the truck driver was injured in the accident.The name of the motorcyclist has not been released. ?