In what situations can motor vehicles cross the bike lane?

If they need to enter a side road
If they need to turn into a lane
If they need to park
All of the above situations are allowed.

Regarding the regulations for motor vehicles crossing bicycle lanes, the correct answer is "4. All of the above situations are allowed." This indicates that New Zealand traffic rules permit crossing bicycle lanes when it is necessary to enter a side road, make a turn into a lane, or stop. The main purpose of this regulation is to ensure the smoothness and flexibility of traffic while also emphasizing the need to remain attentive and cautious towards bicycle lane users during these maneuvers to avoid accidents and ensure the safety of all road users.