What is the meaning of a blue road sign?

A blue road sign is used to provide information about services available to travelers. This includes details about gas stations, rest areas, hotels, and hospitals, which are essential services for drivers on the road. The color blue is universally recognized in traffic signage, particularly in North America, as indicating wayfinding information related to traveler services.

The other sign colors serve different purposes. For instance, speed limit signs are generally white with black lettering, direction signs are often green, and construction zone signs are typically orange. The specific color coding helps drivers quickly identify the type of information a sign conveys, allowing for more efficient navigation and safer travel on the road.