How to judge whether the double flashing lights can be turned on in rainy days?

1, whether to turn on double flashing in rainy days should be judged according to the actual situation, and the judgment is based on visibility and lighting conditions. It is not necessary to turn on the double flash when it is raining, but it is necessary when the visibility is below a certain level.

2. The function of double flashing is to remind other drivers to avoid, so when the visibility is less than 100 meters, double flashing can be turned on.