When an emergency vehicle (ambulance, fire tender, or police car) approaches with flashing lights and siren activated, what must a driver in Bhutan do?

1. Accelerate to stay ahead and clear the road faster
2. Maintain course and speed so the emergency vehicle can navigate around you
3. Pull over safely to the left-hand side of the road and stop until it has passed
4. Stop immediately in the middle of your lane without moving