Which sign color is used for driver services?

The color blue is designated for driver services because it is universally recognized as a color that signifies information and services related to travel and transportation. This color is often used for signs that indicate services available to motorists, such as rest areas, gas stations, and other amenities. Blue signs inform drivers about essential services that will assist them during their journey, making navigation more user-friendly and efficient.

In contrast, other colors such as green are generally used for directional signs and highway markers, yellow typically signals caution or warns of potential hazards, and black is primarily used for regulatory signs, indicating rules that must be followed. Understanding these color conventions can greatly enhance a driver's ability to interpret road signs and navigate safely.