Flashing headlights to say thank you or warn of hazards could land drivers with fines of up to £1,000, according to motoring specialists and driving schools. The seemingly harmless gesture breaches the Highway Code and can be classed as obstructing police.
Why headlight flashing is against the rules
Many motorists flash their headlights to show courtesy, such as thanking another driver for letting them out or giving way. However, Kwik Fit said: "When driving in low-visibility conditions (such as fog or at night), some drivers choose to flash their headlights as a "thank you".
"While this seems harmless, flashing headlights can be a distraction, confusing other drivers and doing more harm than good."
Because of this, the Highway Code stipulates that you should only use 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'.
Fines for warning others of speed cameras
Some motorists use headlights to warn others of speed cameras, police activity or hazards ahead. Misusing headlights in this way can be regarded as obstructing the police.
Driving school company Drive Johnson's stated: "Flashing your headlights can be used to signal to other drivers that there is a speed camera or police ahead. Many drivers are unaware that this helpful gesture can see you facing a fine yourself.
"Motorists can receive fines of up to £1000 for flashing their headlights to warn other drivers."
Car dealership Dick Lovett explained: "If drivers are caught doing this, drivers could face fines of up to £1,000, as legally, this would classify as 'obstructing police duties' under section 89 of the Police Act 1997."
When headlight flashing is allowed
According to the Highway Code, headlights should be used to alert fellow road users to your presence. Only flash your headlights to inform other motorists that you are there if you find yourself in a hazardous situation or if they might not have seen you.
