RG-5 Priority Stop Signs, also known as RG5, RP1 or a R2-1 sign, should be erected at blind intersections, intersections with unusual layout or traffic patterns, by railways operator as part of an RG-32 sign combination.
In 2019, the TCD Update changed Priority Stop Sign Sizes as follows:
675mm x 675mm to 750mm x 750mm
845mm x 845mm to 900mm x 900mm
1015mm x 1015mm to 1200mm x 1200mm