The traffic sign "Single-track vehicles allowed" (sign 1022-11) indicates that single-track vehicles, such as motorcycles, scooters, and bicycles, are permitted to use the road or lane in question. This sign is typically placed in areas where vehicle access restrictions may apply, but single-track vehicles have special permission to enter or use the defined area.

In Germany, this sign helps inform drivers of motor vehicles that single-track vehicles are allowed, and they should be vigilant for their presence on the road. It's important for single-track vehicle riders to follow all traffic regulations, including respecting speed limits and road markings, to ensure their safety and the safety of others.