Under Article 54 of Bahrain's Traffic Law Implementing Regulation, what must a driver do when forced to stop on the carriageway?

1. Leave the vehicle immediately and walk to the nearest exit without marking it
2. Use the hazard warning signals or place warning marks on the road surface so the vehicle is visible from a sufficient distance, especially at night or where stopping is prohibited
3. Wait inside the vehicle with all lights switched off to save the battery
4. Reverse against the flow of traffic to the previous junction