9.6.1. The sign to diagram 554B (S2‑2‑36, see Figure 9-15) or 554C (S2‑2‑37, see Figure 9-16) as appropriate may be used in a road which has gates installed, usually for the control of farm animals. As drivers are likely to have to stop in order to open the gate, diagram 554B “Gate” should normally be supplemented by a distance plate. A plate “For” and a distance, e.g. “For 2 miles” may be used with diagram 554C “Gates”.