We have these in the US too. Lots of times around schools zones or areas where residents have complained about speeding. They look a lot like a speed sign but h

We have these in the US too. Lots of times around schools zones or areas where residents have complained about speeding. They look a lot like a speed sign but have a crude screen with numbers that flash when you go over. There are other signs that show the speed limit and then flash yellow lights if you’re going to fast. Thankfully I don’t think it’s legal for speed cameras in my state although they do have ones at stoplights.