Who may enter a street that has this sign?

The sign indicates a "bicycle street" (Fahrradstraße) where only cyclists are allowed. The additional text "Anlieger frei" means that residents or those with specific business in the area are also permitted to use the street.

According to German traffic regulations, this sign allows:
1. All cyclists to use the street without restrictions.
2. Residents who live on that street or have business there can enter.

Moped riders are not included, as the sign specifically designates it for bicycles and residents. Understanding the combination of these permissions is crucial for ensuring compliance with traffic laws and safely navigating the area.