Ford Ahead Post Mounted Sign - Diagram 554 R2/RA2 (Face Only)Diagram 554 is a permanent post mounted warning sign for use at roads where fords are present at any time, even if theyre likely to dry up in summer. The sign should be placed at the beginning of the road the ford is on, along with a plate indicating the distance and a directional arrow where appropriate. Where the road frequently floods, the Ford Ahead warning sign may be supplemented by a Road liable to flooding plate. Try your brakes should also be