Double flashing lights, also known as hazard warning lights, are mainly used in case of vehicle failure, emergency tasks or extreme weather. The main purpose of using double flashing lights is to tell other vehicles that our vehicle is in a state of emergency and should pay attention to avoidance.

雾灯：雾灯的主要特点是穿透力非常强，而且不会因为雾气产生漫反射反应，所以雾灯不仅能够提醒其他车辆注意我方的车辆，而且还能扩大我们在雾天行车的视野。自拌混凝土搅拌车

Fog lamp: the main feature of the fog lamp is that it has very strong penetration and will not produce diffuse reflection reaction due to fog. Therefore, the fog lamp can not only remind other vehicles to pay attention to our vehicles, but also expand our driving vision in foggy days. Self mixing concrete mixer

在恶劣天气的灯光使用，在道路法中也是有规定的：

The use of lights in bad weather is also stipulated in the road safety law:

1. 如果能见度低于200米，那就需要打开雾灯、近光灯、示廓灯和前后位灯，而且车速不能超过60km/h，同时还要与前车的车距保持在100米以上。

1. If the visibility is less than 200m, it is necessary to turn on the fog lights, low beam lights, position lights and front and rear position lights, and the speed shall not exceed 60km / h. at the same time, the distance from the front vehicle shall be kept at more than 100m. Self mixing concrete mixer

2. 如果能见度低于100米，同样要开启雾灯、近光灯、示廓灯、前后位灯，还要开启双闪灯，车辆行驶速度不能超过40km/h，跟前车的车距要保持在50米以上的距离。

2. If the visibility is less than 100m, turn on the fog lights, low beam lights, clearance lights, front and rear position lights, as well as the double flashing lights. The driving speed of the vehicle shall not exceed 40km / h, and the distance from the vehicle in front shall be maintained at a distance of more than 50m.

3. 当能见度低于50米时，同样要打开雾灯、示廓灯、近光灯、前后位灯、双闪灯，此时车速需要控制在20km/h以内，而且要尽快从近的出口驶出高速公路。自拌混凝土搅拌车，违规使用灯光也是要被罚款的，有些地方查的不严，不被罚款，但是提醒各位车友不要存在侥幸心理，毕竟行车是重要的。对于这些灯光的使用希望能给各位车友带来帮助！

3. When the visibility is less than 50m, turn on the fog lights, clearance lights, low beam lights, front and rear position lights and double flashing lights. At this time, the vehicle speed needs to be controlled within 20km / h, and drive out of the expressway from the nearest exit as soon as possible. For the self mixing concrete mixer truck, the illegal use of lights will also be fined. In some places, the inspection is not strict and will not be fined. However, remind you not to take chances. After all, driving safety is the most important. For the use of these lights, I hope it can help you!