It is not allowed to either **stop** or **park** on a **pedestrian crossing**. This is because pedestrian crossings are designated areas for people to cross the street safely. Stopping or parking in these places can obstruct the visibility and passage of pedestrians, putting their safety at risk.

- **Stopping** refers to momentarily halting the vehicle, while **parking** implies leaving the vehicle in a place for a longer period.
- On pedestrian crossings, both stopping and parking are prohibited because they can block the way and hinder the safe crossing of pedestrians.
- Additionally, parking on a pedestrian crossing is considered **dangerous parking**, as it can impede the proper flow of traffic and the visibility of traffic signals.

For these reasons, it is important to respect the rules and not stop or park on pedestrian crossings to ensure the safety of all road users.