19世纪的英国道路建设已经具有一定规模,使用马车的人多了起来,城市里马车拥堵不堪。有一天,在伦敦市政厅的前方突然飞驰过一辆马车,一位躲闪不及的女士当即丧生车轮之下。这已经不是第一次发生事故了。究竟该如何解决交通问题呢?人们试图使用某种信号灯来提示。当时英国约克郡的已婚女性通常穿红衣服,未婚女士则穿绿衣服,受这种启示,人们想到了红、绿信号灯。 In the 19th century, the road construction in the United Kingdom had already reached a certain scale. There were more people using the carriages and the carriages in the city were congested. One day, a horse carriage suddenly flew in front of London’s City Hall. A lady who couldn’t dodge was immediately killed. This is not the first accident. How do you solve the traffic problem? People try to use a signal light to prompt. At that time, married women in Yorkshire, England, usually wore red clothes and unmarried women wore green clothes. From this revelation, people thought of red and green signals.