What is the visibility mnemonic for foggy days in Subject 4?

[MacNova]

Driving mnemonic: Turn on fog lights, reduce speed, and maintain sufficient distance between vehicles. Precautions for driving in fog: 1. Control speed: When visibility is between 200 and 500 meters, speed should be kept below 80 km/h; when visibility is between 100 and 200 meters, speed should be kept below 60 km/h, etc. 2. Take decisive action: If a traffic accident occurs in foggy conditions, if you can leave the scene immediately, you should evacuate the accident site promptly and avoid lingering in the foggy area. If evacuation is not possible, turn on the vehicle's hazard warning lights, width markers, etc., and place warning signs more than 150 meters in the direction of oncoming traffic to alert other drivers.