When visibility is less than 200 meters, what should the speed and distance between vehicles be?

[MadisonLee]

According to Article [X] of the Road Traffic Safety Law, when visibility is less than 200 meters, maintain a distance of more than 100 meters from the vehicle ahead in the same lane, and the speed should not exceed 60 km/h. Turn on fog lights, low beams, clearance lights, and front and rear position lights. When driving on highways under low-visibility weather conditions such as fog, rain, snow, dust, or hail, highway management authorities should display speed limits and distance-keeping reminders via electronic signs. A safe following distance refers to the necessary gap maintained by a trailing vehicle to avoid unexpected collisions with the vehicle ahead. When driving on highways under low-visibility weather conditions such as fog, rain, snow, dust, or hail, the following rules must be observed: When visibility is less than 500 meters but greater than 200 meters, turn on low beams, width markers, and rear fog lights; speed must not exceed 80 km/h; maintain a following distance of more than 150 meters. When visibility is less than 100 meters, turn on fog lights, low beams, clearance lights, front and rear position lights, and hazard warning flashers; speed must not exceed 40 km/h, and maintain a distance of more than 50 meters from the vehicle ahead in the same lane. When visibility is less than 50 meters, turn on fog lights, low beams, clearance lights, front and rear position lights, and hazard warning flashers; speed must not exceed 20 km/h, and exit the highway at the nearest available exit as soon as possible. Precautions for driving in fog: Use lights properly. In foggy conditions with low visibility, fog lights and clearance lights must be turned on, while high beams are prohibited. High beams project light upward, which gets scattered by the fog, creating a white glare in front of the vehicle that impairs visibility. Fog lights have high penetration and make the vehicle clearly identifiable. Maintain a safe distance from the vehicle ahead—do not follow too closely or overtake recklessly. This ensures sufficient reaction time to avoid rear-end collisions. Frequently use the horn to signal your position.

[MacZane]

Having driven for decades, I am extra cautious when visibility drops below 200 meters in foggy conditions. In such situations, it's best to reduce speed to around 60 kilometers per hour, avoid speeding, and maintain a following distance of at least 50 to 100 meters. I remember when I was younger, driving on the highway with too little distance, I almost rear-ended the car in front. Since then, I've made it a habit to turn on my fog lights so other drivers can see me, turn off cruise control, and stay focused on the road. The same approach applies to similar conditions in rain or snow. The key is to stay calm and patient—getting home safely is what matters most. Always leave extra room when driving normally to avoid accidents due to delayed reactions. Driving in such weather tests your skills, but with experience, it becomes smoother.

[VivianFitz]

As a new driver, my instructor emphasized safety rules for poor visibility during lessons. For example, when visibility drops below 200 meters, speed shouldn't exceed 70 km/h, and following distance should be doubled (e.g., maintaining dozens of meters in urban areas). This was tested during exams - insufficient distance makes braking difficult. During practice, I drive slower, use hazard lights to alert others, and avoid sudden braking or lane changes. In cold weather, I remember to use AC defrosting to clear foggy windows for better visibility. Following these rules not only prevents accidents but also makes driving more reassuring. Learning these has made me a steadier driver.

[AliviaMarie]

As a parent, I pay more attention to safety while driving, especially when visibility drops below 200 meters in foggy conditions. I usually slow down to between 50 and 60 kilometers per hour and maintain a distance of at least 50 meters from the vehicle ahead. With children in the car, I never take risks. Once, during a family trip in heavy fog, I immediately turned off the music to focus on driving and activated the rear fog lights to enhance visibility. The key is not to rush—leaving a few minutes earlier to avoid peak weather conditions. In such situations, increasing the following distance helps prevent sudden braking, reducing anxiety and ensuring greater safety.

[MartinFitz]

On my commute to work, I often encounter heavy fog with visibility less than 200 meters, so I automatically reduce speed. I maintain a speed between 60 to 70 kilometers per hour and follow the three-second rule for safe following distance. Although I usually drive aggressively, I slow down in foggy conditions, turn on navigation for real-time traffic updates, and listen to radio alerts for traffic changes. Leaving earlier reduces stress, and I use the defroster to keep the windshield clear. Maintaining a safe distance allows ample reaction time, avoiding sharp turns and overtaking. Even with a busy schedule, prioritizing safe arrival is always worthwhile.

[DiHayden]

Studying traffic rules is quite interesting, and driving safely in low visibility requires special attention. When I encounter visibility below 200 meters, I reduce my speed to within 60 kilometers per hour and maintain a following distance of at least 100 meters for safety. From a physics perspective, this allows sufficient time and space for braking. Compared to driving in clear weather, doubling the distance in foggy conditions helps avoid chain collisions. An additional tip is to always turn on fog lights to enhance visibility and avoid using recirculation mode to prevent humidity inside the car. Experience tells me that driving slower ensures a safe arrival.