First month 28) (Gengwu years, February 26, 1930, New York, to install traffic lights, to protect those who are walking.

1930 26, New York City installed traffic lights. This decision is in the drivers complain pedestrian walked carriageway. Traffic lights in Manhattan intersection, the protection of people walk "target =" _blank "> traffic light, such as trial success will spread to all over the city, [lssdjt.cn
New York in the other city traffic plan After that, decide not to use the ordinary yellow light signals the yellow light of the role is to tell the driver of the car completely stop the red light appears before Fangmanjusu New York City Department of Transportation that the yellow light is invalid and not to adopt.
traffic lights developed in 1923 by the the black businessmen Callert - Morgan Morgan also invented the gas mask.