The sign "Single-track vehicles allowed" (1022-14) indicates that single-track vehicles, such as bicycles and motorcycles, are permitted to use the roadway. This sign is typically used in areas where certain roads may have restrictions for motor vehicles but allow single-track vehicles to proceed.

In a practical sense, this means that if you are riding a bicycle or riding a motorcycle, you are allowed to travel on the road where this sign is present, even if motor vehicles are restricted. However, it is essential to always remain vigilant and follow other traffic rules and signals while on the road.

If you have any further questions about this sign or German traffic rules, feel free to ask!