What must you do when approaching or being approached by an emergency vehicle using its lights and siren?

When approaching or being approached by an emergency vehicle using its lights and siren, you should safely pull over to the right side of the road and stop until the vehicle has passed. If you are in an intersection, proceed through it carefully and then pull over. Always remain aware of your surroundings and watch for any additional emergency vehicles that may be following. It's crucial to yield the right of way to ensure the emergency vehicle can respond quickly.