Here is a Washington post article that deals with accident heavy intersections in the city. Mentioned are New York Avenue and Florida Avenue. I for one can attest to the fact that those speeding cameras at 6th and Florida are slowing down traffic. I think they are great, but wonder why Porter street up in Cleveland park is the only place to have a traffic light controlled by speed. If you go too fast you will have to come to a complete stop. Otherwise it stays green. I say more of those!
here's the link