Ireland for British Drivers — Same Side, but Signs in Km/h

Of all the places a British driver might take a car, Ireland is the gentlest: you stay on the left, the roundabouts turn the way you expect, and your UK licence is accepted on its own — no International Driving Permit, no translation, nothing to arrange in advance. That removes the two biggest sources of trouble abroad in one go. What’s left are a handful of differences that are easy to miss precisely because everything else feels like home.

The one that catches almost every British driver is units. Ireland’s speed limits are in km/h, not mph. A sign reading “100” on a national road is 100 km/h — about 62 mph — not 100 mph, and the same logic applies in towns (50), on rural roads (80) and motorways (120). If your hire car has a UK speedometer, find the inner km/h ring and read from that, because doing the conversion in your head at speed is exactly how people drift over the limit. Get it wrong and a speeding ticket is a fixed charge of EUR 80 plus penalty points — and yes, points from an Irish offence can follow you. You can sense-check a specific speed on the Speeding Fine Calculator, and our guide to who pays driving fines abroad covers how a hire-car ticket reaches you back home.

Alcohol is the other quiet shift. Ireland’s limit is 0.05 BAC, lower than the 0.08 you live with in Britain, and learners and professional drivers face an even stricter 0.02. The rural pub at the end of a scenic drive is the classic trap; the honest answer is don’t drink and drive at all.

Beyond that, expect Irish rural roads to be narrower and more winding than their British equivalents — tall hedgerows, blind bends, and the occasional tractor — so the national 80 and 100 limits are often optimistic; drive to the road, not the sign. Tolls on the M50 around Dublin are barrier-free and charged electronically, so check your rental’s arrangement to avoid a penalty.

Petrol is around EUR 1.82 a litre and the emergency number is 112 (or 999, both work). For the full ruleset and regional quirks, see the Ireland driving guide.