What does a blue traffic sign indicate?

A blue traffic sign is primarily used to convey information related to road services and emergency evacuation routes. These signs provide drivers with crucial information about services such as rest areas, gas stations, hospitals, and other essential services that may be needed while traveling. Additionally, blue signs can indicate evacuation routes in emergency situations, ensuring that motorists can make informed decisions about their travel.

While other colors of traffic signs serve specific purposes—such as yellow for warnings about hazards, black and white for regulatory information like speed limits, and green for guidance and directions—blue is distinctly designated for service-related information. This color coding is a standardized practice to help drivers quickly and easily recognize the type of information being conveyed as they navigate the roads.