Since the last update if you have a bunch of road cones (with lights) in a row on the map they will all flash at the same time. Till last update this was not the case, they all flashed at a different time. It looks a bit weird now that they all light up at the same moment. If I turn around real quick I do see them flash up at a different time, but thats probably because the graphic card has trouble rendering at a fast turn speed.
Oh and side note, now that I am at the subject of road cones. AI will treat road cones as walls. If you place road cones on a side of a road with 10 meters apart AI can not cross in between the road cones. They will walk all the way along side the road till the road cones end. (While they do clip through editor placed H barriers)