Condition four: the car next door has a problem
Some cars did not close the door, some cars a tire tire pressure is obviously insufficient... When driving on the road, when you happen to see some problems of other cars, people will not turn a blind eye, but how to tell the problem of your car owners in the first time?
In fact, in the headlight language, there are also headlights reminding other vehicles that they have problems and need to pull over for inspection. If there is something wrong with the car next to you, flash the headlights three times in a row to the front car and three more times when the driver in the front car notices the light. Of course, if someone flashes your headlights three times, you also need to be aware that there may be something wrong with your car and the rear car is giving you a friendly warning.

This article by jiangsu new sail components co., LTD