Drivers risk a £1,000 fine for a common headlight mistake many consider harmless: flashing their lights to thank others or warn of hazards. The practice is against the Highway Code and can be treated as obstructing police duties.
Highway Code rules on headlight flashing
Driving experts have revealed that the gesture goes against the Highway Code. 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'."
How can you get a fine?
Some road users use their headlights to signal speed cameras, police presence or other hazards. Misusing the headlights can be considered an obstruction to the police.
Driving school company Drive Johnson's said: "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 added: "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."
And while it might feel nice to help and look out for a fellow driver, it could lead to more reckless drivers on the road if they're not caught by police and fined accordingly. "Remember, speed limits are there to keep everyone, including you, safe."
When should you flash your headlights?
As stated by the Highway Code, flash your headlights when alerting other road users of your presence. Only flash your headlights to warn other drivers that you are there if you are in a dangerous position or if they may not have noticed you.