What must you do upon seeing this traffic sign?

The sign you see is a "STOP" sign, which requires all drivers to stop completely at the designated point. In Germany, this is typically at a stop line or intersection.

The rules state that when you encounter a stop sign, you must:

1. Stop your vehicle completely.
2. Yield to any cross traffic or pedestrians before proceeding.

It is crucial to adhere to this as it ensures safety and prevents accidents at intersections. Ignoring this rule can lead to serious traffic violations and consequences. Always remember that safety comes first when driving!