You find yourself in a situation with reduced visibility due to fog. There is a car 100m in front of you. Which lights can you use?

In a situation with reduced visibility due to fog, you should use your fog lights if your vehicle is equipped with them. Fog lights are designed to cut through fog and illuminate the road ahead without causing glare that can be exacerbated by the fog.

If your vehicle does not have fog lights, you should use your low beam headlights. High beam headlights can cause glare in foggy conditions, making it harder for you to see.

Here are the steps:

1. Identify the type of lights your car has. Check if your car has fog lights. These are usually separate from the main headlights and are located lower down on the vehicle.

2. If your car has fog lights, turn them on. They are designed to cut through fog and light up the road below the fog.

3. If your car does not have fog lights, use your low beam headlights. Do not use high beam headlights as they can cause glare in foggy conditions, making visibility worse.

4. Always maintain a safe distance from the car in front of you. In this case, the car is 100m ahead. In foggy conditions, you should increase your following distance to ensure you have enough time to react if the car in front of you stops or slows down.

5. Drive at a speed that allows you to stop within the distance you can see clearly through your windshield. This is known as the 'see-to-stop' distance. In foggy conditions, this distance is greatly reduced, so you should reduce your speed accordingly.

6. Keep an eye on the road markings and signs to help you navigate through the fog.

Remember, safety should always be your top priority when driving in adverse weather conditions.