Final answer:
Stop on the side of the road in a safe place and use fog lights and hazard lights for visibility during zero visibility conditions due to fog.
Step-by-step explanation:
When visibility is reduced to zero due to fog while driving, it is imperative to ensure your own safety and the safety of others on the road. Stopping on the side of the road until it is safe to continue is the best course of action. Doing so prevents accidents caused by reduced visibility. While stopped, use your fog lights and hazard lights to increase your visibility to others. Remember, using high beams in fog can actually decrease visibility as the light reflects off the fog. Above all, it is essential to stay calm and collected, ensuring that you and other drivers are safe.