When the administrative decree authorizes the positioning of a speed camera device along the side of a single roadway, the road owner is obliged to prepare all the necessary warranty requirements for users regarding the prior warning of the electronic device and the visibility of the signal that announces it on the same side.

These are the principles indicated by the sixth civil section of the Supreme Court in the order no. 23726 of 10/1/2018, that rejected the appeal of a municipality.