What do blue traffic signs typically provide information about?

Blue traffic signs are primarily used to provide information about driver services. These signs indicate essential information such as hospitals, gas stations, food, lodging, and rest areas, which are useful for travelers and drivers seeking assistance or amenities along their route. This helps ensure that drivers can find necessary services conveniently.

In contrast, speed limits, caution areas, and parking regulations are communicated through other colored signs like white, yellow, and green, which signifies their different functions and meanings on the road. This differentiation helps drivers quickly understand the type of message each sign conveys, enhancing safety and navigation efficiency.