Correct answer
40 km/hour.
40 km/h: half the general 80 km/h maximum for this lorry on a conventional road. Article 49 permits lower speeds when traffic, vehicle or road circumstances prevent safely maintaining a higher speed, and in other specified cases. Justified reasons are not confined to breakdowns or emergencies. Do not accelerate to reach 40 km/h if safety requires slower travel; shoulder width does not change this calculation.
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35 km/hour.
45 km/hour.
40 km/hour.
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