Cars keep flashing me
Outside of the courteous gestures that may involve headlight flashing, if you receive random headlight flashing from other drivers this could signify a problem.
You may for instance be driving with full beam headlights on which results in dazzling other road users. check your lights to see if the blue full beam light is illuminated and if so switch to dipped lights.
You may have the fog lights turned on when the conditions are not foggy. Again these are very bright and dazzle other road users.
It may be getting dark and you have forgotten to put your lights on or a front (or rear if flashed from behind) light may have failed whilst driving at night.
Flashing headlights highway code
The Highway Code states: 'Only flash your headlights to let other road users know that you are there. Do not flash your headlights to convey any other message or intimidate other road users.'
The Highway Code is basically suggesting that a driver may flash their headlights to warn other drivers of their presence if in a hazardous position, or to warn another person that may not have noticed you.
When should you flash headlights
Outside of the suggestions made by the Highway Code, the only appropriate situation that calls for a driver to flash their headlights is to warn another driver of a random hazard in the direction they are travelling. Although headlight flashing in itself is potentially hazardous as it redirects a drivers concentration elsewhere, warning a driver of a hazard such as a road accident or flash flood for example, is likely to prove safer and more beneficial.
This situation can apply to flashing a pedestrian to cross the road or at a Zebra crossing, a cyclist to cross the road or exit a junction or many other situations. The problem is that when you flash headlights to signify that someone may proceed, they often react on impulse almost as though they have been given an order. They then take the safety out of their own hands and puts it into the driver who flashed their lights.
The correct procedure, if you intend on being courteous and letting someone cross or out of a junction is to slow down (if safe to do so) and allow a large enough gap for them to move into or cross and to not signal to them to proceed at all. They will use their own initiative to take this opportunity and to use the correct observation before proceeding.
If you really are a persistent headlight flasher, before spontaneously flashing someone, try to ensure it is safe for them to proceed before flashing.
Flashing headlights and the driving test
Although it's not illegal to signal to another driver to proceed by use of headlight flashing or hand gestures, it is not advised to do this during a driving test for the above reasons of being potentially or actually hazardous.