MELVILLE - A new traffic-safety law aimed at keeping police officers safe has gone into effect across New York State.

The law, called the Ambrose-Searles Move Over Act, requires drivers to slow down when they see emergency lights, move to the middle lane when possible and pass a police officer's vehicle with extreme caution.

The law is named after an upstate trooper and deputy sheriff killed while making separate routine traffic stops on the side of a road.