5.2.2. Diagram 522 (S2‑2‑17, see
Figure 5-3 ) is generally used on a one‑way road to indicate
that a road it joins or one that crosses it carries two-way traffic. It is normally sited on the back
of the “no entry” sign. However, it might also be helpful on a two‑way road where it is crossed by
another two‑way road after a succession of intersections with one‑way roads. It is not normally
appropriate in an urban low speed environment where one way roads are regularly encountered
and other visual clues exist as to the nature of the road. It may be used with a distance plate.
