He was pronounced dead at the scene of what was described by police as a gruesome accident.
Investigators said Summer was inbound toward Lexington on Winchester Road when a car turned left onto Haley Pike in front of him, resulting in a deadly collision.
Police said the driver of the car suffered minor injuries.
Investigators said Summer appeared to have been traveling at a high rate of speed.
The Lexington Police Department’s Collision Reconstruction Unit investigated the deadly crash.