Speed LimitsIreland Motorway Speed: 120 km/h (Not mph) — the M50 Toll Trap
Most sources give one number for Ireland, but different limits apply by weather, vehicle and driver experience. Interactive calculator below.
Motorway speed limit in Ireland: 120 km/h.
Kilometres, not miles — and the M50 has no toll booth
Ireland posts its limits in km/h, not mph — an easy trap if you’ve just driven off the ferry from the UK, where 70 mph is the norm. The motorway limit is 120 km/h. Enforcement is mostly GoSafe mobile camera vans, which work over a thousand designated speed zones, often unmarked at the roadside. The sting most tourists don’t see coming is the M50 around Dublin: it’s a barrier-free toll with no booth, and you must pay online (eFlow) by 8pm the following day or a penalty stacks up — rental firms will pass it straight to your card. Serious speeding can mean a court summons, a fine up to €1,000 and five penalty points.
Ireland Speed Limits Explained
Here is the full breakdown of speed limits across all road types in Ireland.
| Road Type | Cars | Trucks |
|———–|——|——–|
| Urban | 50 km/h | 50 km/h |
| Rural | 80 km/h | 80 km/h |
| Motorway | 120 km/h | 80 km/h |
Urban Speed Limits
The urban speed limit in Ireland is 50 km/h for passenger vehicles. Watch for variable speed signs in city centres.
Motorway Speed Limits
The maximum speed on Ireland’s motorways is 120 km/h for passenger vehicles.
Trucks and heavy vehicles are limited to 80 km/h on the same roads.
Speeding Penalties
A speeding fine for going 10 km/h over the limit is approximately EUR 80 (fixed charge) + 3 penalty points.
Check exact speed limits for your route
Open Speed Limit MapWhat Most Guides Don’t Tell You
Enforcement Reality
Ireland deploys a moderate number of speed cameras, concentrated on motorways and accident black spots.
The typical enforcement tolerance is around 7 km/h above the posted limit. Anything beyond that triggers an automatic fine.
Truck Speed Limits
Heavy vehicles on Ireland motorways are capped at 80 km/h, creating a speed differential of 40 km/h with passenger cars. Be alert when overtaking or merging.
Alcohol and Speed
With a BAC limit of 0.05, Ireland is stricter than many destinations. Driving after even one drink and exceeding the speed limit can lead to a double penalty.
Left-Hand Traffic
Ireland drives on the left. If you normally drive on the right, the unfamiliar road layout can slow your reaction time. Stay well within the speed limit until you are comfortable with the mirror-image road design.
How Ireland Compares
| Country | Urban | Rural | Motorway | Driving Side |
|---|---|---|---|---|
| Ireland | 50 km/h | 80 km/h | 120 km/h | Left |
| United Kingdom | 48 km/h | 96 km/h | 112 km/h | Left |
| France | 50 km/h | 80 km/h | 130 km/h | Right |
| Germany | 50 km/h | 100 km/h | 130 km/h | Right |
| Netherlands | 50 km/h | 80 km/h | 100 km/h | Right |
Key Facts at a Glance
| Country | Ireland |
| Urban speed limit | 50 km/h |
| Rural speed limit | 80 km/h |
| Motorway speed limit | 120 km/h |
| Truck motorway limit | 80 km/h |
| Driving side | Left |
| Blood alcohol limit | 0.05 |
| Camera density | Moderate |
| Enforcement tolerance | ~7 km/h |
| Emergency number | 112 |
More Resources
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Related Questions
The motorway speed limit in Ireland is 120 km/h for cars.
The default urban speed limit in Ireland is 50 km/h.
Trucks are limited to 80 km/h on motorways in Ireland.