The issue of color vision deficiency been largely ignored by transportation professionals. An estimated 6-12% of the male population has some sort of colorblindness, meaning roughly 5% of road users are affected. The effects are not well documented, but what is known is that color deficient drivers suffer a disadvantage on the roadway.

The topic is important because 90% of what drivers use to navigate is visual, and much of that information is color-specific. Traffic sign types are denoted by color, and pavement markings in the United States have different meanings if they are striped white vs. yellow. Traffic signals – red and green indications – the two colors most often confused by color-deficient individuals – provide drivers with opposite messages: Red means stop. Green means go.

But to a color-deficient driver, and even more so to a true color blind driver, the colors have little or no meaning.

(Recogido de la página web)