You must have seen traffic signals in every city. All traffic signals have three colors. Which are red, green and yellow. But have you ever wondered why vehicles always stop at the red signal.
Let us tell you that there is a main reason behind using red, yellow and green lights in traffic signals. According to a report by Live Science, the colors used in traffic signals initially were based on the navigation system of ships. Ships had red and green signals. By looking at these, the crew of the ship could easily tell in which direction the ship was going.
Now the question is what was the reason behind using red and green colours. Actually, compared to other colours, these colours can be seen clearly even from a distance. That is why ships used them for navigation. Apart from this, these colours were also used in old light houses. After which they were also included in traffic signals.
Why is only red colour used to stop vehicles at signals? Let us tell you that red colour signal can be seen from a long distance in the sea. After sea navigation, red colour signal is used everywhere for stopping vehicles in railways, airports, everywhere.
Let us tell you that in the initial days when the lights were installed at Parliament Square in London, the traffic lights were used manually. But after some time it was stopped.
The first traffic signal installed on 10 December 1868 at Parliament Square in London was powered by gas. But after a major explosion, traffic lights were virtually banned for the next 50 years.
Published at : 28 May 2024 08:50 PM (IST)
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