bumble ink invention request#1: Rubber Necking Screen

we humbly request someone invent a "Rubber Necking Screen." This screen is something police or firefighters could put up quickly around an accident (maybe with a printed graphic on the outside saying, "Move along please - Nothing to see here" -- cause seriously, there will be nothing to see). It must then be able to collapse just as quickly after they clear everything up. how much traffic would this ease? ask someone who lives in Los Angeles.