Which light must be turned on in foggy weather to alert vehicles and pedestrians?

[LeIvan]

To alert vehicles and pedestrians in foggy weather, the fog lights must be turned on. Here is some related information about defogging: The reason for fogging inside the car is mainly due to temperature differences. When the temperature inside the car is higher than outside, the windows are prone to fogging. Additionally, high humidity inside the car combined with the warm breath of passengers can cause condensation on the cold glass, leading to fogging. The best way to handle fogging inside the car: The quickest and most effective method is to turn on the air conditioning's cold air. By activating the air conditioning's cooling function along with the external circulation, the fog on the windows should disappear in less than a minute. During autumn or winter, using the air conditioning's warm air to blow on the windshield is recommended.