STOP signs are red. Speed Limit signs are black and white. Warning signs are yellow, signs in construction zones are orange, guide signs have a green background and recreation signs have a brown background. Why?



The next time you see a STOP sign, ask yourself this question: are you reading word STOP, the vibrant red color, or the octagon shape? The answer is likely a combination of the three. When we view a sign, we interpret its color and shape just as much as we do its message. Using a standard color scheme helps drivers understand how to react to a sign before they are able to read it. Uniformity, in combination with visibility, helps to increase driver response times and improve safety on the road.

The MUTCD establishes 13 colors that have been identified for use on traffic control devices; eleven of these colors have established uses and can be seen on the road today. Two additional colors, Coral and Light Blue, have been designated for use on traffic devices but have not yet been assigned meaning. What meaning would you assign to Coral and Light Blue?