Luke Shaw, 20, of Carey Road, Bitterne, died in hospital on Wednesday, June 29, from the injuries he sustained in the collision on the M27.
His mum, Tracy Pearce, said: “Luke was a son, a brother and an uncle. He was loved by many.
“Although Luke may not be with us in person anymore, he will always remain in our memories and most importantly our hearts.
“Since passing, a light has gone out in all our lives.”
His dad, Gary Shaw, added: “Luke was not only my son, he was my best friend.
“I am so proud of the man he had become and all he achieved, particularly in his job at Kwit Fit where he was extremely respected, loved and valued.”
The two other men in the car, a 20-year-old and a 19-year-old, were also taken to hospital but have since been discharged.
Officers from the Serious Collision Investigation Unit would like to hear from any witnesses who saw the incident or the blue Corsa prior to the collision.
Anyone with information about the incident should call 101, quoting 44160238596, or Crimestoppers anonymously on 0800 555 111.