Neil Sullingston, 53, was sentenced on August 1 after being found guilty of manslaughter earlier this week.
He drove his car into 36-year-old Wayne Wigley in Esher, Surrey, on the morning of July 1, 2024.
Sullingston, of Orpington, was driving to work in his white Seat Ibiza along the A244 when he noticed Mr Wigley riding a moped behind him.
The two men had previously been involved in road rage incidents on May 16 and June 5, which Sullingston had reported to police.
At around 6.19am on July 1, dashcam and CCTV footage showed Mr Wigley throwing a rock at Sullingston’s car, smashing the rear window.
Mr Wigley then entered the right filter lane near the junction with Milbourne Lane.
Sullingston followed in close pursuit before deliberately driving into the back of the scooter without braking or swerving.
The impact threw Mr Wigley from the moped, severing his right lower leg and causing catastrophic internal injuries.
Members of the public, including an off-duty police officer, a paramedic and a firefighter tried to help but Mr Wigley was pronounced dead at the scene.
Detective Chief Inspector Natalie Pearce, the senior investigating officer, said: “Our thoughts are with the family and friends of Wayne Wigley following his death in July last year.
“Sadly, on the day in question, the road rage escalated with fatal consequences. Sullingston deliberately drove at Mr Wigley, intending to cause harm, which ultimately resulted in his death.
“His actions that day were inexcusable and unforgivable, and the fact that he has been imprisoned today for 13 years after being found guilty of manslaughter has ensured he has been brought to justice for the loss of another man’s life.”
Mr Wigley’s family said:
“Wayne is dearly missed by his seven children, his mum, dad, partner, sister and all his friends. He was well loved by all and would do anything for anyone.
“He was strong-minded, loyal, generous and funny. A keen fisherman, a skilled banger racer and a gifted car mechanic.
“We would like to thank all our family and friends for their support, which has helped us through the horror of what has happened.”