What does the color blue generally indicate for signs?

The color blue on signs is commonly used to convey information. This includes signs that provide details about services, such as rest areas, hospitals, and various points of interest. It helps drivers identify key locations and services that might be useful during their travels.

In contrast, other colors serve different purposes: warning signs are typically yellow or orange to alert drivers about potential hazards or changes in road conditions, construction signs often utilize bright colors like orange to stand out and indicate work zones, and signs indicating items for sale are usually not standardized and can come in various colors. The use of blue as a color for informational signage is designed to be easily recognizable and understood by drivers, ensuring they can quickly access important reminders and services while on the road.