What is the safe following distance in fog with 200 meters visibility?

[StRebecca]

When driving in fog with 200 meters visibility, vehicles should maintain a distance of at least 100 meters from the preceding vehicle in the same lane. Below are precautions for driving in foggy conditions: 1. Proper use of lights: Drivers should turn on both front and rear fog lights when driving in fog. If the fog is extremely dense, hazard lights should also be activated. The primary purpose of using fog lights and hazard lights is to enhance visibility for other drivers, helping to prevent rear-end collisions or side-swipe accidents. 2. Timely roadside parking: If heavy fog suddenly appears and there's no time to reach the nearest service area, drivers should promptly pull over to the highway emergency stopping lane while turning on fog lights, width markers, and tail lights. Additionally, warning signs should be placed at least 150 meters away in the direction of approaching traffic.