What regulations should be observed when driving on the expressway under low visibility meteorological conditions?

Hello, I'm glad to answer your question. When a motor vehicle runs on an expressway, it shall comply with the following provisions in case of low visibility meteorological conditions such as fog, rain, snow, dust and hail:

(1) When the visibility is less than 200m, turn on the fog lights, low beam lights, position lights and front and rear position lights, the speed shall not exceed 60km per hour, and keep a distance of more than100m from vehicles in the same lane;

(2) When the visibility is less than 100 meters, turn on fog lights, low beam lights, position lights, front and rear position lights and hazard warning flashlights, the speed shall not exceed 40 kilometers per hour, and keep a distance of more than 50 meters from the vehicle in front of the same lane;

(3) When the visibility is less than 50 meters, turn on fog lights, low beam lights, position lights, front and rear position lights and hazard warning flashlights, and the speed shall not exceed 20 kilometers per hour, and leave the expressway from the nearest exit as soon as possible. In case of the circumstances specified in the preceding paragraph, the expressway management department shall release the prompt information such as speed limit and distance keeping through the display screen.

It should be noted that when driving a motor vehicle on the expressway, the visibility should be below 200m and the speed should not exceed 60km/h under low visibility meteorological conditions, and the distance from the vehicle in front of the same lane should be at least 100m to ensure safety. In different grades of rainfall, the damage coefficient of light rain is very high, even exceeding the damage degree of heavy rain. The reason is that light rain has little effect on the vision when driving, and drivers are easy to relax their vigilance. But light rain can wet the dust on the road and become a good lubricant. When an emergency happens, the braking distance of emergency braking increases, which leads to traffic accidents and becomes the main mode of some road traffic accidents in rainy days. Compared with precipitation, snowfall has a more serious impact on traffic safety. In the case of emergency braking, rollover, rear-end collision and serial collision are easy to occur. In addition, in snowy days, it is difficult to start automatically, especially on uphill sections, and it is easy to slide backwards and collide with the rear car. In addition, snowfall will cover up the original potholes or obstacles on the road surface, which will bring great safety hazards to driving safety. In the case of icing, it is difficult for vehicles to drive, and emergency braking is easy to lock up. In addition, freezing will seriously affect the quality of pavement and easily lead to problems such as pavement cracking and bagging. When it freezes and melts, it will break through the subgrade and overflow along the road, posing a serious threat to traffic safety; Severe freezing will make the subgrade sink, even lead to landslides and other problems, which will affect the driving safety.

Legal basis: Annex II of the Provisions on the Application and Use of Motor Vehicle Driving License (OrderNo. 123 of the Ministry of Public Security) and Article 2 of the Provisions on Scoring for Illegal Acts of Road Traffic Safety: "If a motor vehicle driver commits one of the following illegal acts, score 6 points at a time: if he does not drive a motor vehicle on the expressway according to the regulations under low visibility meteorological conditions, I hope the above contents will be helpful to you, thank you!