For all objects that protrude beyond the exterior dimensions of the motorhome, warning signs must be used in Italy and Spain.
Usually bike racks or motorcycle racks are mounted at the rear of the vehicle or surfboards are beyond the outer dimensions of the vehicle.
Today there are already
with 'bags' for the warning signs.
The warning sign can then be slid into the transparent bag of the bicycle case. For unlit vehicles with large width, mostly trucks or luxury motorhomes, park warning signs are also required in some countries. The current regulations can be found at the ADAC.
Mandatory in Spain and Italy e.g. with mounted bike carrier - please pay attention to the correct use of the warning sign!