As they say, ignorance of the law is not an excuse!
Claim: Motorists in most U.S. states can be fined for failing to slow down or change lanes when passing parked emergency vehicles
NEW TRAFFIC LAW
Every state except Hawaii and Maryland and the D.C. has this law. In California , the "Move-over" law was operative in 2007 and amended on January 1, 2010.
If a patrol car is pulled over to the side of the road, you have to change to the next lane (away from the stopped vehicle) or slow down by 20 mph.
A friend's son got a ticket for this recently. A police car (turned out it was 2 police cars) was on the side of the road giving a ticket to someone else. He slowed down to pass but did not move into the other lane. The second police car immediately pulled him over and gave him a ticket. He had never heard of the law. It is a fairly new law that states if any emergency vehicle is on the side of the road, if you are able, you are to move into the far lane.
Please let everyone you know that drives about this new law. It is true (see details at the following web address). http://www.snopes.com/politics/traffic/moveover.asp