The “Overall height” of a vehicle is measured:

1. From the floor of the box until the highest point of the truck.
2. From the road’s surface until the vehicle’s highest point (including all its fixtures, and when it is loaded)..
3. Correct answer: From the road’s surface until the vehicle’s highest point (including all its fixtures, and when it is not loaded).
4. From the road’s surface until the roof of the driver's compartment.

WhyOverall height is measured from the road to the highest point of the vehicle with all its fixtures, unloaded. Height with freight is the freight height.