Move Over Law - Creating a Buffer Zone for Police Officers (and Others)

After driving through a few states that I haven't driven through before, I noticed that cars were moving over into the left lane when coming up on a police car doing a traffic stop. Having worked as a paramedic in the past, I've always done this but very rarely saw other cars doing the same. It got me thinking: Are there states that have a law requiring drivers to move away from the nearest lane of the traffic stop?

I found an article from the Chicago Tribune about this topic (State police target drivers who don't yield to Scott's Law for emergency workers

While some drivers are upset after getting ticketed, the author of the article makes it clear: " The best advice is to be alert for flashing lights and steer clear of trouble." My only concern is that while local drivers should be aware of this law, drivers from out of state may not be aware of this law leading to unnecessary tickets. I think there should be signs posted at the entrance to the state.

Overall this is a great law that will reduce public safety deaths!