Maximum length (for example 10 m)

The number says how long the vehicle can be at most, and it applies to everyone, including buses and cars with a caravan. Those equally long can pass; those longer cannot pass, even at night.

It is not a distance to keep.

Word: Lunghezza = how long it is from front to back.

The exam is in Italian: key terms and trap words are kept in Italian, so you learn them.