An HGV breaks down on a smart motorway and the driver can reach an emergency area. What is the safest general action?

1. Stop in the emergency area, use hazard warning lights, leave the vehicle from the safer side if possible and get behind a barrier before calling for help
2. Stay in the cab without a seatbelt because it is raining
3. Place a warning triangle in the motorway lane
4. Try to repair the vehicle in the live lane