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If you are travelling to Italy by bike, you must comply with Italian regulations on load securing when transporting it by car. The legal situation has changed several times in recent months, causing confusion. It is now clear that the warning sign requirement remains in place.
In Italy, any load extending beyond the rear of the vehicle must be labelled with a Warning sign must be labelled. If the overhanging load takes up the entire width of the vehicle, two warning signs are required. These must be attached to the left and right at the side end of the load.
Rear carriers mounted on the trailer coupling are also subject to the labelling requirement. This applies even if the carrier has a repeat licence plate and its own lighting. An amendment to the law in January 2025 and a circular from the Italian Ministry of Infrastructure and Transport had initially promised relief. However, the planned exemption for appropriately equipped rear carriers was not implemented.
The ADAC recommends that all motorists taking their bicycles to Italy display warning signs when transporting them. Fines can be issued if the labelling is missing.
The warning sign must be made of sheet metal and have a minimum size of 50 x 50 centimetres. It is labelled with five red and white stripes >> e.g. available here. Violations of the labelling requirement are punishable by a fine of at least 87 euros. The Italian authorities may prohibit you from continuing your journey if the warning plates are missing.
The legal situation regarding the attachment of bicycle carriers to vehicles has changed several times in recent years. Most recently, there was supposed to be an exception for rear carriers on the towbar with their own lighting and repeat licence plate. However, this regulation was not transposed into law.

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