A freight transporting vehicle shall be marked with a “Caution, wide load” sign when:

1. The freight width is more than 1.80 meters.
2. Correct answer: The freight width is more than 2.50 meters.
3. The freight width is more than 2.10 meters.
4. The freight width is less than 2.40 meters.

WhyA 'Caution, wide load' sign is required if the freight is wider than 2.50 m.