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Color measurement accuracy is important for traffic signs because drivers need to see and comprehend information quickly while traveling at high speeds. Image Source: MaxPixel user Nikon D90
No matter where you are in the world, the color of a traffic sign can instantly tell you roughly what that sign means, even if you’re unable to read the symbols and text written on it. Seeing a flash of red on the side of the road up ahead almost always signals to the driver that a full stop is coming up. Meanwhile, a green sign tells you to proceed, a yellow sign tells you to slow down, an orange sign urges extreme caution, and blue signs tell you where you are. Adhering to the same basic color language worldwide helps drivers follow the rules and stay safe on the road.
Spectrophotometers Ensure Accurate Traffic Sign Coloration
Many years before Richard Hunter introduced the L a b color system to the world, governments understood the need for uniform colors for traffic control. Red, Orange and Yellow were defined in terms of the color system used in the 1930s, which was then luminosity, dominant wavelength, and purity. These became the Yxy system of color measurement. Even today, all traffic signage, including retroreflective designs, is still reported in Yxy, though the overwhelming majority of current color specifications are reported in L*a*b*.
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