Why are firetrucks red?

One popular answer to why fire trucks are red goes something like this: "Because they have eight wheels and four people on them, and four plus eight makes twelve, and there are twelve inches in a foot, and one foot is a ruler, and Queen Elizabeth was a ruler, and Queen Elizabeth was also a ship, and the ship sailed the seas, and there were fish in the seas, and fish have fins, and the Finns fought the Russians, and the Russians are red, and fire trucks are always "Russian" around, so that’s why fire trucks are red!"

Fire trucks are red so because red is a warning color so that others can tell that they need to move out of its way