Humped crossing' Supplementary Plate - Post Mount Diagram 547.8 R2/RA2This supplementary plate is normally seen in conjunction with permanent sign face 544. It warns drivers that there is a raised crossing ahead and that they should expect a hump in the road, as well as pedestrians. The sign face can be adjusted to include a distance measurement such as 400 yds and a directional arrow if the hump is not directly ahead, for these variations please do not hesitate to contact us for pricing. The sign wording size can be