A Rubbernecking Solution?

Simple, cheap, extremely obvious, and apparently fairly effective.

From Freakonomics...

Rubbernecking is one of the more interesting cases of moral whipsawing I can think of. All the time we sit in the jam we curse the drivers in front of us for their blood lust. But when it’s our turn at the front of the line… well, just a quick peek. Even if the sight of twisted metal doesn’t thrill you, curiosity about what on earth just caused you to waste 45 minutes is often just too powerful to resist. Besides, we waited our turn and it’s only fair that we senselessly victimize others the way we were just victimized ourselves. Karma, I guess.

and The Dish...

[I]ncident screens have been trialed and developed to prevent road users from observing the incident and post-incident activities on the opposite carriageway. The aim is that if the scene is not visible to the traffic from the opposite carriageway it will prevent drivers from rubbernecking. Research carried out by the Highways Agency (UK) has established that the quick deployment and setting up of screening around serious incidents can reduce the amount of rubbernecking. This will also reduce the knock-on effects of congestion and secondary incidents occurring.

Now they just need to try it in the U.S.