Box junction

What it means

You must not enter the box unless your exit road or lane is clear, so the junction never gets blocked.

The criss-cross lines mark an area that must be kept clear. Wait at the edge of the box until there is room for your whole vehicle on the other side.

The exception is turning right: you may enter the box and wait if your exit is clear and only oncoming traffic, or other vehicles waiting to turn right, stop you.

Where you'll see it

At busy junctions where queuing traffic would otherwise block the crossing traffic.

Rules to know

• You must not enter the box until your exit road or lane is clear. You may enter and wait when turning right if you are only stopped by oncoming traffic or other vehicles waiting to turn right.

  The Highway Code, Rule 174

• At signalled roundabouts you must not enter the box unless you can cross over it completely without stopping.

  The Highway Code, Rule 174

• A yellow box may be marked where stationary traffic would be likely to block a junction. You must not enter it if your exit is not clear.

  Know Your Traffic Signs, p. 80

Common mistakes

• Mistake: Following the car in front into the box when the traffic ahead is queuing.

  Instead: Wait at the edge until there is room for your whole vehicle beyond the box.

Test yourself

Recalling the answer helps it stick. Pick an answer to see how you did.

Question 1 of 1

What does this marking mean?

• ANo waiting at any time
• BNo waiting during the times shown on signs
• CDo not enter unless your exit is clear
• DDo not stop outside the school entrance

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