Pull over to the right.  The Police Officer is either stopping you or trying to get around you. If he is stopping you, put your directional on and carefully move to the shoulder of the road. Never slam on your brakes and never stop in the travel lane. Do not get out of your car - wait for the Officer to approach you. This is done for your safety and the safety of the Officer. If the Officer is trying to get around you, safely pull to the right side of the roadway and stop until the Officer goes by. Then pull safely back out into the traffic lane and continue on your route.