So ive been stuck driving for the past 4 years and ive always wondered one thing. Why does red mean stop and green mean go, and why did they not put the green on top instead of at the bottom. Well so i would stop wonderring i looked it up. Traffic lights were derived from the rail singles used in the 1800s and these singles used to have stop at the top and go at the bottom due to the fact that it was accutally a lever. when you pushed the lever up it put up a warning too tell the incoming train too stop. Vice versa if the lever was down no single would show and the train would continue on its marry way. The rail road system singles however only used red so i had too look even more to find the reason for the color choice. The green and red colors used in todays traffic lights are accutally derived from old maratime rules. green (meaning starboard) and red (meaning port). in mairtime rules the ship on the port side always yeiled to a ship that is coming from the starboard side and thus ships on port (red) stop and ships on starboard (green) go. So always remeber red does mean stop unless you want to be crushed by ship... err car next too you.
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