The first ever traffic lights in the world

The first ever traffic lights in the world. The first traffic lights is considered to be a weird device from 1868r which first appeared in England. It was located in front of the British parlament. It was powered by gas and had only two signals green one and red one and also required manual switch by a police officer. Unfortunately after a month of using, it exploded injuring a police officer and was scrapped. This type of traffic lights never appeared again. 
In England on the Piccadilly street in 1925 first electric traffic lights were installed and there are now 6300 of them in the capital. They are automatically controlled by a central computer, they reduce congestion and smooth traffic flow. However the first ever electric traffic lights were installed in the USA in 1914 and it had only two signals green one and red one, the first ever tricolour traffic lights also appeared in USA and it was in 1920r. In Poland first traffic lights were installed at an intersection of jerozolimskie avenue and Marszałkowska street in 1926r.
https://youtu.be/t8iAlCdvjJE?si=2jQQ0Un56M7t9Bqu

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