Sussex Police have now named the victim as Anthony Saunders, 49, from Lower Faircox in Henfield.
He died at the scene from his injuries on Monday following a collision with a passing Peugeot.
Saunders was a traffic management worker who was subcontracted to West Sussex Highways which is a joint venture between West Sussex County Council and Balfour Beatty Living Places.
Sgt Mel Doyle said: “Anyone who has any information or witnessed the collision is asked to contact police on 101 quoting Op Copland.”