In which case is it prohibited to drive onto the same-direction tram tracks located at the same level as the carriageway?

1. 1When travel on it is prohibited by road signs or road markings.
2. 2When the width of the carriageway is sufficient for driving around without moving onto the tram track.
3. 3If, when moving onto the tram track, an obstruction is created for the travel of a tram.
4. 4Answers 1 and 2.
5. 5Answers 1, 2, and 3.