Guides/Theory test

Roundabout Rules in Ireland: Lanes, Signals and Who Yields

Updated 31 August 2026 · 6 min read

Roundabouts are where most learners lose marks, and it is rarely the yielding that catches them. It is lane choice and signalling. The rule that fixes both is the clock face: picture the roundabout as a clock with your entry at six o’clock, and every decision follows from where your exit sits on the dial.

Rule one: yield to the right

On approach you give way to traffic already on the roundabout and to traffic coming from your right. Unless a sign, road marking or traffic light says otherwise, that is the whole priority rule. You also give way to pedestrians already crossing at the exit you are taking.

Yield does not mean stop. If there is a safe gap, keep moving. Stopping at a clear roundabout is a driving-test fault of its own, and it is what causes the nose-to-tail bumps you see at busy junctions.

Rule two: you always turn left to enter

Traffic on an Irish roundabout flows clockwise, so you enter by turning left, and you pass to the left of the central island. It sounds obvious until you meet a mini-roundabout, where the temptation to cut straight across the painted circle is real. You may not: treat the painted dome as if it were a kerb.

Rule three: the clock face decides your lane

You are at six o’clock. Work out roughly where your exit sits, then use this. Road markings override it wherever they exist, and on approach they usually do.

Two lanes on approach: which one to take
Your exit	Approach lane	Signal on approach	Signal to leave
Anywhere between 6 and 12 o’clock (first exit, or straight on)	Left	Left for the first exit, none for straight on	Left, after the exit before yours
Past 12 o’clock (right turn, or back the way you came)	Right	Right	Left, after the exit before yours

The signal to leave is the same in every case: indicate left once you have passed the exit before the one you want. That single habit is what makes you readable to everyone else on the roundabout.

Going straight on

No signal on approach. Approach in the left lane unless markings tell you otherwise, stay in your lane around the roundabout, then indicate left after the exit before yours. Learners often signal left on the way in, which tells the driver waiting at the next entry that you are leaving there, and they pull out.

Turning right or going full circle

Approach in the right lane with a right indicator, keep the right indicator on as you pass the exits you are not taking, then switch to left after the exit before yours. Going all the way round back to where you came from uses exactly the same routine.

Where the clock face gets overruled

Painted arrows and destination markings in the lanes. These always win. Some large junctions send the left lane right, and you follow the paint.
Traffic lights on the roundabout, common in Dublin. Lights beat the yield rule while they are working.
Spiral markings, where the lane you are in feeds you off at a set exit whether or not that was your plan.
Bus and cycle lanes crossing the entry, which you must not block or occupy.

Long vehicles, trailers and towing

A long vehicle may need both lanes to get round, and Irish roundabouts often have markings that allow it. Leave space and do not overtake alongside one, because the trailer end sweeps wider than the cab. If you are the one towing, reduce speed on entry: a trailer that is loaded high can roll on a tight roundabout at a speed that feels perfectly normal in a car.

Cyclists and motorcyclists

Cyclists are entitled to use the full lane on a roundabout, and many stay left the whole way round even when exiting late. Check your left mirror before every exit. On a motorcycle, treat the painted markings as slippery in the wet and stay out of the greasy centre of the lane.

Roundabout questions are in the test

Yielding, lane choice, signalling and the roundabout warning signs all appear in the official question bank. Practise them free.

Practise roundabout questions

Frequently asked questions

+Who has right of way on a roundabout in Ireland?

Traffic already on the roundabout and traffic coming from your right, unless a sign, road marking or traffic light says otherwise. You also yield to pedestrians already crossing at your exit.

+Which lane should I use on a two-lane roundabout in Ireland?

For any exit between the 6 and 12 o’clock positions, approach in the left lane. For anything past 12 o’clock, approach in the right lane. Painted lane markings override this wherever they exist.

+Do you indicate when going straight on at a roundabout?

Not on approach. Indicate left only after you pass the exit before the one you are taking, so drivers waiting at the earlier exits know you are not leaving there.

+Which way do you go around a roundabout in Ireland?

Clockwise. You enter by turning left and pass to the left of the central island.

+Can you drive over a mini-roundabout in Ireland?

No. Even where the central island is painted flat, you must go around it as if it were raised.

+What happens if I take the wrong lane on a roundabout?

Follow the lane you are in through to its exit, then come back round. Cutting across a lane on a roundabout is far more dangerous than adding a minute to your journey, and on a driving test it is a serious fault.