How do traffic lights work?

Traffic lights are an essential part of our road infrastructure, but have you ever wondered how they work? 🤔

Traffic signals are those three lights that tell you when to stop, when to go, and when to proceed with caution. If these traffic lights weren't used, our intersections would be chaotic! 🧐

Watch our video to discover how traffic lights work and how they are made!😁

#engineering

[jimmyhuesandthehouserocker]

Back in around 1960, in the last few seconds of the red light before it changed to green, the yellow light came on, so drivers could shift their manual transmissions into gear and be ready to go. Also, near the end of the green light cycle, the yellow light then came on. The yellow and green were both on at the same time. Sometimes in small towns, the go light was blue. My Uncle Cap told us kids, there was a little man who lived inside the signal, who changed the lights and Santa brought him new light bulbs on Christmas

[ehenyor]

The US traffic light system needs a MAJOR overhaul. I appreciate how the video mentioned lights works in tandem, and although they do at intersections, there are many lights along a street that do not. The outcome? Red light after red light after red light... We need smart traffic light systems that work in a network, going beyond what was described in the video. (Thanks for the info, by the way!)

[talknonsense]

Please add a "How traffic lights should be used" video for my country.

[MikinessAnalog]

You forgot to mention some emergency vehicles (police, fire and ambulance) may also have a remote control to change the light when approaching them.

[tobibobibo]

Its not weight sensors, its inductive loop sensors…

[robertkennedy]

Why do lights turn red for me with no one else approaching intersection? I don't know why but I shoot them out and go anyway

[carllalire]

In my country, green means honk your horn as loud as you can and be an asshole, yellow is to go faster to reach the intersection before it turns red, and red means go if there are no enforcers to see you.

[gibanica]

Yellow light before red, in Serbia doesn't mean stop but speed up :)

[sinister_ray]

I always thought that the traffic lights are worked by humans when they control is by going red, yellow or green 😂

[jasonervoes]

I disagree with the end of traffic lights. They never ever should've come out with self driver less cars in the first place. They don't even know what's going on.

[balticstain]

Unfortunately people who operate traffic lights still get very wrong, allot of traffic signals aren't synchronised with each other especially on long continueses

[aussie]

Running a yellow light could be reduced if drivers were educated correctly on the road rules. You must stop on a yellow light if it is safe to do so. Anyone speeding up when they clearly could and should be braking scores themself a $1, 000 fine.

[aFan_of]

They are far behind proper traffic light efficency. The city planners and engineers agree to make the road lights as inefficient as possible in order to create "compunded stresses" on the roads.

[abps]

Thats how they bait you and giving you a fat ticket 🎫!
Never know how they do it but they have control system!

[anuragtumane]

Here is something which traffic lights which a lot of people did not know before.

[Bullonearth]

In India people love to break traffic signals

[Andy-dphg]

Walk, Bicycle, motorcycle, cars, airplanes when passing intersections Y have to be following the traffic laws.
Respectively I am

[giancarlo_rc]

_In the 20th century:_ *Traffic lights* were automated
_In the 21st century:_ *Cars* are automated
_In the 22nd century:_ *Humans* will be automated?.... xD
I can't sleep at nights haha

[justrandomthings]

You should also mention that Garrett Morgan was the inventor of the traffic light. 🙄

[yongchen]

Why traffic light timer 30 seconds not a minute