What does a blue traffic sign typically indicate?

A blue traffic sign typically indicates service-related information. This includes important amenities and services that drivers may need during their travel, such as rest areas, gas stations, restaurants, and lodging. The use of blue as a color for these signs helps distinguish them from other types of signs, ensuring that drivers can quickly identify places that provide essential services for road users. This function is critical for trip planning and ensuring comfort on longer journeys.

While other colors are used for specific purposes—like yellow for warning signs or white for regulatory signs—blue's association with services makes it easy for travelers to spot necessary stops. This efficient communication contributes to safety and convenience on the road, as it allows drivers to make informed decisions without confusion.