Traffic signals can be on poles, bars or suspended from above and they can be placed horizontally or vertically. Here's why Texas likes horizontal ones.
Traffic signals have been around for more than a hundred years and have pretty much always used the same colors. Texas may be soon freshen up its color game.
As someone who has traveled across much of this country and the world, for that matter, I can see with confidence that we have some of the worst traffic lights here in Texas.