Who invented the traffic lights?
In the light of the foot, with a long rod the police want to affect the color conversion lantern belt. Later, in the center of the signal lamp fitted with a gas chimney, there are two red and green glass in front of it alternately block.
. Later, the parliament building in London before the carriage rolled frequent accidents, so people inspired by the red and green installed, in December 10, 1868, the first member of the family lights was born in London, Capitol Square, by the then British engineers Hart design and manufacture of the lamp post is 7 meters high, hanging on the lantern -- the traffic lights a red, green and white, this is the first city street lamp lights
Among them, a red woman that I have to get married, a green woman is unmarried.
At the beginning of ninth Century, in the middle of the city of York, red and green represent the different status of women
