Correct answer
40 kilometres per hour.
It is 40 km/h: half the general 80 km/h maximum for motor vehicles towing trailers on a conventional road. A motor-vehicles-only designation does not turn the road into a motorway or dual carriageway, where the general minimum is 60 km/h. Never maintain a minimum speed at the expense of safety: lower speeds are permitted when traffic, vehicle or road conditions prevent maintaining it safely, and in other specified cases. The question excludes transport operations with different limits.
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50 kilometres per hour.
40 kilometres per hour.
45 kilometres per hour.
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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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