You have all seen this, at least in the U.S. The red paint on signs of all kinds, such as traffic signs, no smoking signs, etc. fades after a year or two, while the other colors last for a decade or more. Why can't the sign industry invent and use a red paint that lasts as long as the other colors, mainly black? I think probably someone invented such a paint long ago but for some reason the sign industry doesn't use it. Maybe because it's too expensive. Among other things, this is a safety issue. For example, when you are driving and see a graphic "no left turn" sign in which the red paint (slash) has faded, you have to take a few more tenths of a second to figure out what the sign means, and when you are driving, you often must make decisions in one second or less. This is also increases the risk you will be ticketed for, for example, unintentionally smoking in a no-smoking area. You then get into an argument with the police officer and with the court about whether someone with normal intelligence and vision should be able to read the faulty sign. Over the years I have learned how to interpret signs in which the red paint has faded. For example, a "P" in which part of the letter is missing means "no parking" and a cigarette that has a blank spot in the middle means "no smoking". But some people have a hard time doing this kind of pattern recognition, and we shouldn't have to.

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