What color is often used for signs that provide guidance related to services for drivers?

The color blue is primarily used for signs that provide information about services for drivers, such as gas stations, rest areas, food options, and lodging. This color is utilized to help travelers easily identify places where they can find assistance and amenities while on the road. The use of blue for service-related signage is consistent across the United States, promoting uniformity and making it easier for drivers to navigate and plan their travels.

In contrast, other colors serve different purposes: white is typically used for regulatory signs, brown is designated for recreational and cultural interest signs, and orange is used mainly for construction and maintenance warnings. Understanding the significance of these colors helps drivers quickly interpret important information while driving.