5.2.5
and
5.4.1
). It should be noted
that, in addition to diagram 510, diagram 511 may only be used in combination with diagram
504.1, 505.1, 506.1, 507.1, 510, 512, 512.1, 512.2, 512.3, 513, 516, 517, 520, 523.1, 524.1, 528
or 556.
2.4.3. The “REDUCE SPEED NOW” plate may be used with the diagrams detailed, where it is
considered that a warning sign alone might not result in a sufficient reduction of speed to enable
the hazard to be negotiated in safety.
Figure 2-8
Figure 2-9
Diagram 510 (S2‑2‑7) Roundabout ahead
Diagram 511 (S2‑3‑1) Reduce speed now
2.4.4. Where a roundabout on such a road follows a series of grade separated junctions,
the signing described in
2.4.2
should be supplemented by an additional sign to diagram 510
on each side of the carriageway, plated with diagram 572 “½ mile”. On other roads, where
JUNCTIONS
19
accidents result from excessive approach speeds, signs to diagram 510 should be sited in
accordance with the recommendations in
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