What must you do when an emergency vehicle (police, gendarmerie, fire brigade, or ambulance) approaches sounding a siren and displaying flashing emergency lights?

1. Immediately yield right of way by pulling over to the right-hand edge of the road and stopping if necessary to allow clear passage
2. Accelerate to keep ahead of the emergency vehicle
3. Continue driving normally at your current speed and lane
4. Stop abruptly in the middle of your lane without pulling over