Definition
Minimum speed is the speed below which it is forbidden to drive without a justified cause (slow vehicle by design, obstacle, weather, etc.). On motorways and dual carriageways, the default minimum is half the posted maximum, unless a sign indicates otherwise.
Key facts
- Motorway and dual carriageway: default minimum 60 km/h (half of 120).
- Vertical sign R-411 can set a different minimum.
- Driving abnormally slow without cause is a serious offence.
- Bicycles and special vehicles may go slower if their design speed requires it.
Practice real questions on this topic
Free DGT 2026 test with exam-style questions and explanations. No signup. Or explore the free DGT test in English hub for everything in one place.
In the DGT exam
- A dual-purpose vehicle, without a trailer or special transport operation, travels on a motorway with no lower specific limit. What is its general maximum speed?
- As a general limit, with no lower restriction, what is the maximum speed for a passenger car towing a trailer on an unpaved road outside built-up areas?
- On a conventional road outside built-up areas, without physical separation of directions or another restriction, a passenger car has a general limit of 90 km/h. With no reason justifying a lower speed, what is its minimum speed?
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