What does a blue sign typically indicate?

A blue sign typically indicates service information, which includes directions to facilities such as hospitals, gas stations, rest areas, and other services that drivers may need while traveling. This color is specifically used to direct motorists to important services and amenities, making it clear where drivers can find assistance or necessary resources during their journey.

The significance of blue as a color for service signs lies in its ability to convey helpful information quickly, ensuring that drivers can easily identify where to go for various needs without confusion.