The Highway Code applies to England, Scotland and Wales. It's essential reading for
everyone. Here's a reminder about box junctions.
Highway Code rule 174
Box junctions. These have criss-cross yellow lines painted on the road (see 'Road
markings' (PDF, 715KB)).
You MUST NOT enter the box until your exit road or lane is clear. However, you may
enter the box and wait when you want to turn right, and are only stopped from doing
so by oncoming traffic, or by other vehicles waiting to turn right.
At signalled roundabouts you MUST NOT enter the box unless you can cross over it
completely without stopping.
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