1.6.1
). No other modifications are permitted.
2.2.3. The sign to diagram 507.1 should be used only in the following circumstances:
a) where the 85th percentile speed of traffic is 30 mph or less and the stagger does not exceed
50 m, or
b) where the 85th percentile speed of traffic is greater than 30 mph and the stagger does not
exceed 120 m.
2.2.4. If the priority route is itself the staggered route through the junction, diagram 507.1 must
not be used, but a map-type advance direction sign might be beneficial. In all other cases,
the two junctions should be signed individually with signs to diagram 506.1. A supplementary
distance plate (see section
17
) should be provided at the second sign in cases where the siting
distance shown in column 4 of
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