Dashed line: you can overtake

The middle line is dashed, so you can overtake and cross over the line. You find it where you can see well: after a curve, after a level crossing, or on the downhill side of a hump.

It is not there before a curve, on the uphill side of a hump, or before a junction.

Word: Tratteggiata = made of short pieces, not continuous.

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