Abstract: A traffic barrier rail retrofit device assembly (RDA) for rehabilitating a traffic barrier rail includes a stay-in-place steel formed system configured to match various barrier shapes, lengths, and joint configurations. The RDA includes brackets attachable to an preexisting barrier with an anchoring means such as a threaded rod or bolt that connects the bracket to the barrier. Slotted apertures and an integrated alignment mechanism permit the bracket to be aligned properly adjacent to sides of the barrier before being immobilized. A barrier face plate is adapted to attach to the bracket. When the barrier face plate is secured to the bracket, a cavity formed between the barrier face plate and the barrier may be back-filled with material that forms a shell over the original barrier, effectively reshaping the barrier, and covering over, and thus rehabilitating and repairing prior damage to the original barrier.