What is the maximum speed when visibility on the highway is less than 100 meters?

[DelSerenity]

When visibility on the highway is less than 100 meters, the maximum speed should not exceed 40 kilometers per hour, and a distance of more than 50 meters should be maintained from the vehicle ahead in the same lane. Below are the relevant regulations for visibility: When visibility is less than 200 meters: Turn on fog lights, low beam headlights, clearance lights, front and rear position lights, and the speed should not exceed 60 kilometers per hour, maintaining a distance of more than 100 meters from the vehicle ahead in the same lane. When visibility is less than 100 meters: Turn on fog lights, low beam headlights, clearance lights, front and rear position lights, and hazard warning flashers, and the speed should not exceed 40 kilometers per hour, maintaining 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 beam headlights, clearance lights, front and rear position lights, and hazard warning flashers, and the speed should not exceed 20 kilometers per hour, and exit the highway from the nearest exit as soon as possible.

[Alexandra]

Once when I was driving on the highway in heavy fog with visibility less than 100 meters, I had to keep my speed under 40 km/h. This is strictly required by traffic rules because driving faster would make it impossible to see vehicles ahead clearly, and it would be dangerous if a car suddenly stopped. I remember it was drizzling that day, and the thick fog covered everything. Even after slowing down to 40 km/h, I maintained a distance of about 200 meters from the car in front, with my fog lights and hazard lights on, to get through safely. Although the speed was slow, it ensured timely braking and avoided rear-end collisions. Normally, driving at 70-80 km/h on the highway is quite fast, but in bad weather, safety comes first—it’s much more important than saving time. So, I recommend everyone not to speed when visibility is low, drive steadily under 40 km/h, and always stay alert to changing road conditions.

[Olivia]

When I first learned to drive, my instructor emphasized that the speed limit is 40 kilometers per hour when visibility is less than 100 meters on the highway. Once during rainy and foggy weather, I tried driving at this reduced speed and felt much more in control. In conditions of poor visibility, sudden acceleration or braking can be extremely dangerous. This rule is designed to protect all drivers, especially beginners like me who tend to get nervous. I also noticed the importance of turning on headlights and fog lights to aid visibility, maintaining a safe distance of at least 150 meters. Although it’s slower, driving at a reduced speed gives you more time to react to unexpected situations. If you encounter an emergency stopping lane, pull over promptly to rest and wait for the fog to dissipate.

[DeJohnny]

As a homemaker who often drives with children, when highway visibility drops below 100 meters, I must drive under 40 km/h. Driving too fast with poor visibility frightens the kids and causes motion sickness. I've found driving slower in thick fog actually feels safer and more stable, and turning on fog lights helps me read road signs within 50 meters. Always remember to maintain sufficient following distance – the 40 km/h rule exists for good reason as slower speeds protect everyone.

[McJessica]

Having driven for over a decade, I never exceed 40 km/h when visibility drops below 100 meters. The reason is that higher speeds extend braking distance in poor visibility conditions, and maintaining around 40 km/h allows effective emergency stopping to prevent accidents. I also make it a habit to check my vehicle's lights and braking system to ensure they're functioning properly. In rainy or foggy weather, safety comes first – I rely on reduced speed to avoid unexpected incidents.

[LeMaggie]

When driving on the highway with visibility less than 100 meters, the speed limit is 40 kilometers per hour. This rule ensures everyone's safety, as driving at a lower speed allows for steadier movement in poor visibility. It's recommended to use fog lights and maintain a safe distance, which helps me travel safely in severe weather conditions.