As a resident, you want to drive into a cycle highway that has this sign. What must you be aware of when doing so?

This sign marks a “Fahrradstraße” (bicycle street) with an additional sign that allows access for residents ("Anlieger frei"). In a bicycle street, cars are allowed only under certain conditions—here, only for residents. The key rules are: vehicles must not exceed 30 km/h, cyclists may ride side by side, and car drivers must not interfere with bicycle traffic. You selected all correct requirements, which shows good understanding of how to behave in a Fahrradstraße as a resident. Always give priority to cyclists and drive slowly and carefully.