A person at the side of the road is wearing a yellow armband with three black spots. What does this armband indicate?

The yellow armband with three black dots indicates that the person is blind or visually impaired. According to German traffic rules, when you see someone wearing this armband, you are required to exercise special caution and offer assistance if necessary. This may include stopping to let them cross the street or being extra attentive in situations where they might not notice your vehicle. The important points are to recognize the armband as a sign of a visual impairment and to remember your obligation to behave considerately and responsibly to ensure the person's safety.