What must be constantly operative on a motorized bicycle?

The requirement for having lights for permanent dipped headlights, a rear light, and a rear reflector on a motorized bicycle is based on German traffic regulations aimed at ensuring visibility and safety on the road.

1. Permanent dipped headlights enhance visibility both for the rider and for other road users, making it easier to be seen in various weather conditions, especially during dawn, dusk, or nighttime.

2. The rear light is a critical safety feature that signals the presence of the bicycle to vehicles behind it, reducing the risk of collisions.

3. The rear reflector increases visibility through reflection of light, especially in low-light conditions, ensuring that other road users can see the bicycle from behind.

All these components work together to promote safety and compliance with traffic laws, which are essential for all vehicles on German roads. Therefore, having all three is necessary for legal operation and overall safety.