Meaning Traffic Lights Explained | Traffic Light Why Red & Green Colors | ஏன் சிகப்பு & பச்சை நிறங்கள்?
Especially when running late, we often see these tri-coloured poles on intersections as the bane of our existence.
The first ever traffic signals were installed outside the Houses of Parliament in London, in December of 1868, to control the traffic of horse carriages, allowing pedestrians to cross the roads safely - 40 years before the first car was commercially available.
In 1920, William Potts, a policeman in Detroit invented the first tri-coloured lights, introducing a third colour, amber (yellow / orange) in Detroit, Michigan, USA.
1923, an African American inventor named Garrett Morgan, after witnessing an accident, patented an affordable traffic signal using a similar tri-coloured system.
With the invention of computers & technology, computerized detection enabled quicker changing of lights.
⏰TIMESTAMPS⏰
00:34 First even traffic light
01:23 traffic light invention
01:40 initial traffic control system
02:10 who invented traffic lights
02:25 where was first traffic light installed
03:10 automated traffic light invention
04:08 why is traffic light red
04:30 what is visible spectrum
05:10 why is sky blue
06:19 what is vibgyor
07:00 railway traffic lighting system
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