Correct answer
Half the generic maximum speed set for lorries on this type of road.
The normal progress of another vehicle must not be hindered by driving at an abnormally reduced speed without justified cause. For these purposes, motor vehicles are prohibited from travelling on motorways and dual carriageways at a speed lower than 60 kilometres per hour, and on other roads at a speed lower than half the generic maximum speed.
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60 km/h.
Half the generic maximum speed set for lorries on this type of road.
50 km/h.
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Glossary terms in this question
Conventional road
Interurban road that is not a motorway, dual carriageway or expressway.
Dual carriageway
Fast road with separated carriageways per direction and at least two lanes each way, no at-grade intersections.
Motorway
Top-grade public road with separated carriageways, no direct property access, restricted to motor vehicles.
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