This means that the bus compartment is installed on a public bus and channels, using only a car with the number of people on the bus is not less than the number specified in the tag.
Means that the field bus signage area is defined as the bus loads. And the only vehicles with the number of people on no less than the number indicated on the label.
Means channel bus sign is an area where the bus channel masses. And the only available cars were on the bus, no less than the numbers indicated on the label.