When is it prohibited to stop or park a vehicle?

1. Besides blue-white painted curbstones?.
2. When the vehicle is parked in the left lane of a one-way urban road.
3. Correct answer: When the vehicle obstructs the traffic or blocks a road sign.
4. When the vehicle is not locked.

WhyYou may not stop or park so that the vehicle obstructs traffic or blocks a road sign. The other options are made-up bans.