Traffic lights are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic. The history of traffic lights is associated with the historic growth of the automobile See more

Before traffic lights, traffic police controlled the flow of traffic. A well-documented example is that on London Bridge in 1722. Three men were … See more

In 1912, the first electric traffic light was developed by Lester Wire, a policeman in Salt Lake City, Utah. It was installed by the American Traffic Signal Company on the corner of East … See more

When incandescent lamps began to replace gas-powered lamps, it was necessary to incorporate a coloured lens in red, yellow or … See more

Despite the failure of the world's first traffic light in London in 1869, countries all around the world still made traffic lights. By 1880, traffic lights spread all over the world, and it has always been like that, since then. However, the early traffic lights in the late 19th … See more

The control of traffic lights made a big turn with the rise of computers in America in the 1950s. Thanks to computers, the changing of lights made traffic flow even better thanks to computerised detection. A pressure plate was placed at intersections so that computers … See more