It is particularly perplexing that some of these people who she reports to have seen driving in an unsafe manner are likely parents who just dropped off their own children.
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.