A traffic sign forbidding vehicles to drive faster than 70 k.p.h is placed on an urban road. Which of the following vehicles is forbidden to drive according to the sign’s speed indication?

1. Commercial vehicles and work vehicles with an all up weight that doesn’t exceed 10,000 kg. Their speed limit is 50 k.p.h.
2. Commercial vehicles that are used for carrying goods and that are not equipped with safety belts. Their speed limit is 50 k.p.h.
3. Vehicles that were manufactured before 1969 and that are not equipped with safety belts. Their speed limit is 50 k.p.h.
4. Correct answer: Commercial vehicles or work vehicles with an all up weight of 12,000 kg. Their speed limit is 50 k.p.h.

WhyCommercial and work vehicles of 12,000 kg are limited to 50 KPH in town, so the 70 sign does not apply to them.