Speed limit questions are among the most straightforward on the theory test, but they still catch people out. Whether you’re driving through Donegal’s built-up areas at 50 km/h or on national roads at 100 km/h, knowing the limits is non-negotiable.
Donegal has some of Ireland’s most varied and challenging roads. Letterkenny is a busy regional town with complex roundabout systems. The Wild Atlantic Way through Donegal passes some of Europe’s highest sea cliffs. Mountain roads through the Bluestack and Derryveagh mountains are steep and winding. Being geographically isolated from Dublin, Donegal’s roads carry significant freight traffic. Cross-border driving to Derry is common, requiring awareness of jurisdiction changes.
Speed limit questions are pure memorisation — there’s no logic to derive, you either know the number or you don’t. The good news is there are only a handful of speed limits to learn.
The key numbers: Built-up areas: 50 km/h. Regional roads: 80 km/h. National roads: 100 km/h. Motorways: 120 km/h. Special zones (schools, housing estates) may have 30 km/h limits. Learner drivers have no separate speed limits but must display L plates.
Study approach: Create a simple table of all speed limits and review it daily. The questions will test you on specific scenarios (“what is the speed limit on a regional road?”) rather than asking you to recall the full table.
Common trap: The default speed limit when entering a built-up area is 50 km/h even without a sign — the built-up area boundary sign itself implies 50.
Q1.What is the speed limit on a motorway?
Q2.What is the default speed limit in built-up areas?
Q3.What is the speed limit on a national road?
These are just a sample. L-Plate has all 60 speed limits questions with AI-powered explanations.
Built-up: 50 km/h, National: 100 km/h, Motorway: 120 km/h
School zones: 30 km/h during school hours
Special speed limits are indicated by signs
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Built-up areas: 50 km/h, Regional roads: 80 km/h, National roads: 100 km/h, Motorways: 120 km/h.
30 km/h during school hours in school zones.
Donegal has two test centres: Letterkenny (6 weeks) and Donegal Town (6 weeks). Both have relatively short waits.
Both have similar wait times of about 6 weeks. Choose whichever is closer to you geographically.
The RSA question bank contains 60 speed limits questions. On any given test, you’ll typically see 3–12 questions from this category depending on the random selection.
The national average pass rate for speed limits questions is 78%. Practising all 60 questions on L-Plate significantly improves your chances.