What is the visibility mnemonic for foggy days in Subject 4?
3 Answers
Driving mnemonic: Turn on fog lights, reduce speed, and maintain sufficient distance between vehicles. Below is an introduction to Subject 4: 1. Definition: Subject 4, also known as the Subject 4 theoretical test or driver's theoretical test, is part of the motor vehicle driver's license assessment. 2. Common term: After the implementation of the "Order No. 139 of the Ministry of Public Security of the People's Republic of China", the Subject 3 test was divided into two parts. In addition to the road test, a safety and civilized knowledge test was added, commonly referred to as "Subject 4", which assesses "driving ethics". Since this test is conducted after Subject 3, it is commonly referred to as the Subject 4 test. In official terms, there is no Subject 4.
Having just obtained my driver's license, I'm deeply impressed by the visibility mnemonic for foggy conditions in Subject Four: 'One Five Two Six Five Two Zero'. This mnemonic means: when visibility is below 100 meters, speed should be kept under 40 km/h; below 50 meters, no more than 20 km/h; and below 200 meters, the upper limit is 60 km/h. Pay attention to the following distances as well: leave at least 50 meters of space when visibility is 100 meters, and at least 100 meters when it's 200 meters. When actually driving in fog, this rule gives me much more peace of mind because with poor visibility, a slight lapse in attention could lead to a rear-end collision. I always make sure to use fog lights and low beams, but never high beams, as they can cause glare and trouble. Slowing down is key; braking early is safer than slamming on the brakes. Roads are slippery in fog, so keeping a firm grip on the steering wheel is crucial. Testing myself on this mnemonic often and making it a habit can prevent a lot of trouble.
Having driven for many years, I can personally attest that the foggy weather mnemonic for Subject 4 is quite effective. Simply put, it's '200 limit 60, 100 limit 40, 50 limit 20'. When visibility drops below 200 meters, keep your speed under 60 km/h and maintain a following distance of 100 meters. Below 100 meters visibility, 40 km/h is the maximum speed, with the following distance reduced to 50 meters. If visibility is less than 50 meters, slow down to 20 km/h, and it's best to find a safe spot to stop or exit the highway. Besides remembering these speed limits, turning on fog lights and hazard lights increases visibility, while avoiding high beams that can cause glare. I often encounter thick fog on highways, where preemptive judgment and reducing engine speed are key. Avoid sudden acceleration or braking—when fog is so thick you can't see traffic signals, slowing down wins the day. Regular maintenance of the braking system is also crucial to minimize risks.
