10.1.1. The “Ford” sign to diagram 554 (S2‑2‑38, see Figure 10-1) should be used at all fords, even those which dry up in summer. The sign should also be placed at the entry to the road leading to the ford, accompanied by a distance plate with or without an arrow as appropriate (see section 17). Where a road is subjected to frequent flooding, the “Ford” sign may be supplemented by a “Road liable to flooding” plate. Whilst the water depth gauge is no longer a prescribed sign, authorities are encouraged to continue to place these indications at locations where the ford might become impassable in times of flood.