Flood Ahead Post Mounted Sign - Diagram 554A R2/RA2 (Face Only)The Flood Ahead sign to diagram 554A indicates where a road has flooded. The sign should only be present when the flood is, or is expected to in the near future. This sign is a part of our broad range of high quality post mounted signs. The sign may be used with a distance plate to show how long the flooded road is to be expected, with or without an arrow pointing left or right. Where the flooded length of road ends, a Try Your Brakes sign to diagram