#amazingfacts #factsyoudidntknow #trafficlights #trafficrules
The earliest traffic signals were designed for trains, not cars. They were red and green, gas-powered, and more than a little dangerous in the event of a leak.
The traffic light was invented for trains. At the time, it had only two colors: red for stop and white for go. A green light was later added to mean caution. So it was red for stop, green for caution, and white for go.However, the white light soon proved problematic as train drivers often mistook it for a distant star or some other light. Train companies noticed this and replaced the white light with green. So it was red for stop and green for go. Road traffic regulators adopted the traffic lights when vehicles came along.
