What is the sign of floating dust weather?

The symbol of floating dust is represented by the English letter "S". Floating dust weather refers to the weather phenomenon that dust and fine sand float evenly in the air, making the horizontal visibility less than 10 km. This weather is very harmful to people's lungs. Dust contains a large number of particles, and the harm of these particles to human body mainly depends on the size of the particles. ?

Traffic safety tips:

Like smog, floating dust weather has many adverse effects on our daily driving safety, resulting in low visibility, poor line of sight and short sight distance, which can easily lead to accidents.

When the visibility is less than 500 meters and more than 200 meters, the speed shall not exceed 80 kilometers per hour. When the visibility is less than 200m and greater than100m, the speed shall not exceed 60km per hour. When the visibility is less than 100 meters and more than 50 meters, the speed shall not exceed 40 kilometers per hour. When the visibility is within 30 meters, the speed should be controlled below 20 kilometers per hour. Generally, when the sight distance is about 10 meter, the speed should be controlled below 5 kilometers per hour.