These plastic Wall reflectors are provided with prism reflectors with a very high reflection value. Due to the high reflection value, the reflectors are clearly visible over a long distance. The course of the road where barriers are used for road relocation, these reflectors ensure perfect traffic management. The barrier reflector can be mounted by means of 2 screws are fastened against the concrete barrier. This base of the barrier reflector is made of an impact-resistant plastic on which 2 prism reflectors are mounted. This reflector can optionally be made single or double-sided. Optionally, it is possible to provide this reflector with a magnet so that it can be mounted against steel barriers.