A city or town doesn't set up its traffic lights horizontally for aesthetics, there is a traffic reason.

Traffic lights are not as straightforward as you may think. For instance, Japan has blue traffic lights, and while it's common to see the lights arranged vertically, some U.S. states mount them ...

You might think traffic light systems are fairly basic. After all, electric traffic signals first appeared all the way back in 1914. However, they have advanced significantly since their inception, ...