For which type of vehicle is sign BB4 specifically for?

The sign BB4 is specifically designed to indicate areas where good vehicles, particularly those involved in loading or unloading, are permitted to stop or park. This sign helps manage traffic flow and ensure that delivery and service vehicles can operate efficiently in designated areas without disrupting traffic.

In urban and commercial zones, the presence of such signs is crucial for facilitating logistics and maintaining the order of road usage, allowing necessary goods to be delivered while minimizing inconvenience to other road users. This context makes it clear that the sign is not applicable to all vehicles or public transportation exclusively, which may have different signage and regulations governing their operation. Heavy vehicles may indeed align with the sign’s purpose, but the specific focus is on those vehicles that are actively loading or unloading cargo.