What vehicles may enter a cycle highway that has this sign?

The sign indicates a "cycle street" (Fahrradstraße) where bicycles have priority over other vehicles. The additional sign "Anlieger frei" means that only residents or people with a specific reason to be there can access the road.

In this context, while all vehicles driven by residents can enter the cycle highway, other vehicles, such as mopeds under 25 km/h and cars traveling at walking speed, are typically not allowed unless specified. This is to ensure safety for cyclists by minimizing non-cycling traffic on the road. Understanding which vehicles can legally enter helps maintain a safe environment for cyclists.