"understand precisely how they work"
UK drivers are being warned about a common dashboard mistake that could make their vehicles difficult to see from behind in autumn rain or fading light.
The issue involves relying on daytime running lights (DRLs) instead of manually switching on dipped headlights when visibility becomes poor.
DRLs automatically activate when the engine starts in many modern cars, but some systems only illuminate the front of the vehicle.
This means the rear lights can remain switched off, leaving a vehicle less visible to drivers approaching from behind during poor conditions.
Graham Conway, Managing Director at Select Car Leasing, previously highlighted the issue.
He said: “DRLs have been helping to improve road safety for more than a decade now. But I’d urge motorists to understand precisely how they work and what job they’re supposed to do.
“The most important thing to remember is that many DRL systems don’t automatically light the rear lights.
“If you want to be seen by the cars who are following you, be sure to click your headlights on.”
The Highway Code states under Rule 226 that drivers must use headlights when visibility is seriously reduced, generally when they cannot see for more than 100 metres.
This can include conditions such as heavy rain, fog and darkness.
Drivers should switch to dipped headlights when visibility drops, even when their DRLs are already illuminated.
They should also check that their rear lights have come on rather than assuming the vehicle’s automatic lighting system has activated them.
Fog lights should only be used when visibility is seriously reduced and should be switched off once conditions improve.
The potential maximum fine for failing to use headlights correctly can reach £1,000 if a case reaches court. However, this is not an automatic roadside fine, with any penalty depending on the offence and circumstances.
Drivers can avoid the mistake by switching their lights to dipped beam when conditions worsen.
Those unsure about their vehicle’s automatic lighting system should check the handbook while parked and confirm which lights activate in different settings.
It is also important to ensure that lamps are clean and working properly before setting off.
Meanwhile, UK Google search data analysed by OK T-Shirt found that searches for “when to use headlights” fell by 30% between the latest complete 30-day period and the previous one.
The comparison covered July 15 to August 13, and August 14 to September 12.
OK T-Shirt’s data experts said:
“It’s easy to assume the car has handled the lights for you, especially when the dashboard looks normal.”
They added: “I’d treat the darker commute as a reminder to check what is actually switched on, because being visible from behind matters more than convenience.”
With autumn bringing shorter days and wetter conditions, drivers are being reminded to check their headlights rather than relying entirely on automatic lighting systems.
