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Originally Posted by Mirek Wawrzynski
Hi
As you know red is more visible from the long distance then any others colors?
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Mike: I am not knowledgable of light wave physics, but here in the US, several studies were done regarding the use of red and yellow for emergency vehicles, especially fire engines, and how to make them more visable to other drivers (we Americans have a bad habit of having collisions with them when they are on emergency runs). The studies clearly showed that yellow was more visible from short to longer distances. So, during the 1970/80s, many fire engines were ordered in yellow. However, both firemen and the public wanted them red, so the newer ones are reverting to red. However, ambulances are still yellow.