Can I wait in a yellow box junction while turning right in Northern Ireland?

Yes, in the recognised right-turn exception: you may wait in the yellow box when your exit is clear but oncoming traffic or other right-turning vehicles prevent you completing the turn.

The exception does not allow you to enter when the road you want to join is itself blocked.

For “Can I wait in a yellow box junction while turning right in Northern Ireland?”, the wider Northern Ireland context is this: Northern Ireland's Highway Code uses signs, signals and road markings together, so the safest reading is always the exact sign at the location plus any lane arrows, plates or temporary traffic management. Rules expressed as ‘must’ or ‘must not’ are legal requirements; advisory wording can still be used as evidence when responsibility for a collision is considered.

For this exact question — “Can I wait in a yellow box junction while turning right in Northern Ireland?” — the practical point is: Before entering, identify a clear exit position and make sure your only obstruction is the traffic you are legitimately waiting to cross. The answer should be applied to the actual signs, conditions, licence wording or parking rules in force at the time, because temporary restrictions and individual DVA decisions can change the ordinary position.

This Northern Ireland-specific page on “Can I wait in a yellow box junction while turning right in Northern Ireland?” was checked against the attached official sources before publication, with nidirect/DVA and the Northern Ireland Highway Code used ahead of generic UK motoring articles. If the rule, road layout or personal licence condition changes, those primary sources are the ones to re-check.