The man who died on the A27 at Falmer on Saturday (July 5) has been named as Adam Zachary Rice.
He was a 21-year-old student with the International Summer School of Sussex University from California in America.
Emergency services were called at around 1.15am on Saturday to a collision on the eastbound A27 at Falmer between a car and a pedestrian.
Adam, who was the pedestrian, sadly died at hospital on Sunday (July 6).
Police are appealing to anyone who witnessed the collision or saw the pedestrian leading up to it to contact Sussex Police on 101 or email email@example.com quoting Operation Telemark.