Enacted in 2002, the law requires drivers to move over at least one lane away from any emergency or tow vehicle parked on the side of the road with its emergency lights on. If drivers cannot spare a lane, they must slow down to 20 mph below the posted speed limit. If the speed limit is 20 mph or less, drivers must slow down to 5 mph, according to the statute, which covers both highways and regular roads. This year, utility and sanitation vehicles were added to the statute.