For those unfamiliar with the concept, a leading pedestrian interval lets pedestrians go for at least a couple of seconds before the signal for cars turns green. This is a ridiculously cheap intervention that measurably improves pedestrian safety through increased visibility in crosswalks. I'm not sure if it's been implemented District-wide, but it's at a ton of intersections now and at least in my experience, it definitely feels safer. Sometimes DDOT can do stupid things, but I'm real glad they made this change and wish it was more common across the US.