When may you enter a box junction?

Explanation: Yellow box junctions are marked on the road to prevent the road becoming blocked. Don't enter the box unless your exit road is clear. You may wait in the box if you want to turn right and your exit road is clear but oncoming traffic or other vehicles waiting to turn right are preventing you from making the turn.

Category: Rules of the road

References: The Official DVSA Guide to Driving: Section 6, Highway Code: Rule 174