What must you heed in this situation?

In this situation, you are approaching a bus stop where passengers are getting on and off a bus. In German traffic law, when passing a stopped bus, you must adhere to certain rules to ensure the safety of passengers.

1. **Pass at walking speed**: This is important to minimize risks for pedestrians, especially children, who might unexpectedly cross the road to board or alight from the bus.

2. **Only pass if you are sure passengers are not endangered**: Before passing, you should ensure that no passengers are in the process of boarding or disembarking and that they will not step into the path of your vehicle.

Neglecting these rules could lead to dangerous situations, including accidents involving pedestrians. Therefore, it's crucial to follow both of these points in order to ensure the safety of everyone involved. Ignoring them could have serious consequences, both legally and in terms of personal safety.