What does a blue traffic sign mean?
What does a blue traffic sign mean? A sign showing a nearby state park is an example of a traffic sign with a brown background. Blue Traffic Signs. Blue traffic signs display road services and evacuation route information. A sign showing information about amenities at an upcoming exit is an example of a traffic sign with a blue background.
What color are warning signs?
Warning. Warning signs typically use a yellow background with black letters or symbols to convey their purpose. Most warning signs are diamond-shaped and use symbols to indicate the nature of the potential hazard.