Driving on the left in Ireland

The border changes the units, not the driving side

The Republic of Ireland uses kilometres for distances and km/h for speed limits. Traffic stays on the left when you cross into Northern Ireland, but speed limits there are in mph. Check the dashboard units before and after crossing; the same number does not represent the same speed. Read the Road Safety Authority: advice for tourists and nidirect: driving in Northern Ireland guidance for each part of your journey.

Give narrow roads more time

A route that looks short on the map may involve bends, walls, hedges and limited room to pass. Plan a shorter first day instead of treating a navigation estimate as a promise. Keep the whole car within your lane; sitting on the right can make the passenger side feel farther away than you expect.

Slow before a bend so you can stop within the clear road you can see. If two vehicles cannot safely pass, stop where you have space and assess the situation instead of squeezing through beside a wall. Use suitable, legal stopping places for photographs or navigation changes. Read current RSA: Rules of the Road alongside the signs you encounter; avoid relying on an old default-speed table.

Agree who pays the M50 toll before you drive

Dublin’s M50 has barrier-free tolling: passing the toll point does not involve stopping at a booth. Ask the rental desk whether they handle this toll or whether you must pay it yourself. Where the driver is responsible, eFlow’s payment deadline is 8 pm the following day. Check the current eFlow: M50 toll and rental-car FAQs for the procedure and rental arrangements.

Write down the registration and the provider’s answer at collection. Do not assume all Irish toll roads use the same payment system, or pay twice if your rental agreement already includes an automatic arrangement.

Prepare for your actual itinerary

Check licence eligibility with the RSA and documents with the rental company. If your route enters Northern Ireland, confirm cross-border permission, cover and assistance arrangements before collecting the car. Reserve the transmission you intend to drive and check it again at handover.

Plan the first few junctions out of the depot while parked. When a roundabout comes first, identify your exit and marked approach lane before joining the traffic. At each stop during the trip, use a brief “left lane, mirrors, route” reminder before moving off.

Practise lane position before the scenic route

Set Leftside to km/h for a Republic of Ireland trip and use the lane-position lesson. Compare the cockpit and follow views to notice where the left wheels sit. Then read the right-hand-drive car checklist. The virtual town does not simulate Ireland’s narrow rural lanes, local signs or M50 payments.