Traffic police in Baltimore.
I was there this summer and the gridlock was atrocious. People push their way into the intersection, the light turns red, and they are stuck there until the light is about to turn red in the opposite direction, at which point those people push their way into the intersection and the cycle perpetuates. During rush hour, they have police standing in the intersections–not to direct traffic, though, simply to hold their hand up when the light turns red so that people don’t push their way into the intersection. Basically, a human has to stand in traffic for hours JUST to tell the drivers what the lights mean. It was unbelievable. – u/Brocktoberfest