What does a blue road sign indicate in Italy?

In Italy, a blue road sign primarily signifies motorway or route guidance. These signs are used to provide drivers with essential information regarding routes, directions, and services available on motorways. The blue background enhances visibility and indicates that the information pertains to highways and major roadways, which are generally designed for faster travel and typically have specific regulations.

While other colors and sign shapes serve different purposes — such as warning signs or prohibitive signs — the blue signs specifically are focused on guiding drivers rather than indicating restrictions or warnings. This color is internationally recognized for traffic information, helping to streamline navigation for drivers, especially in areas that may be unfamiliar.