Temperatures plunge and snow settles across parts of the UK, many motorists are tempted to leave their engines running while waiting for frozen windscreens to clear. However, road safety experts are warning that repeatedly doing so on a public road could result in fines of up to £1,000.
The Royal Automobile Club (RAC) Foundation has reminded drivers that leaving a vehicle unattended with the engine running is an offence under the Highway Code. Known as “idling”, the practice breaches Rule 123, alongside regulations within the Road Vehicles (Construction and Use) Regulations 1986.
Beyond the legal implications, idling also poses environmental concerns. According to the RAC, a stationary engine can emit up to twice as much pollution as one that is moving, worsening local air quality. Air pollution remains a serious public health issue, with the Royal College of Physicians estimating in 2016 that it contributes to around 40,000 deaths each year in the UK.
Drivers who refuse to switch off their engine when instructed may initially face a fixed penalty notice of £20. If unpaid within 28 days, this can rise to £40, then £80, and ultimately reach £1,000 for repeat offenders. The rules do not apply on private driveways, but they are enforceable on public roads.
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Legal expert Gary Rycroft, speaking on BBC Morning Live, also warned motorists about the risks of inadequate windscreen clearing. He highlighted the danger of so-called “portholing”, where only a small section of ice is removed, leaving drivers with severely restricted visibility.
Using a vehicle in a dangerous condition can lead to a £60 fine and three penalty points. Clearing only the driver’s side of the windscreen is not sufficient; motorists must ensure the entire glass area is free from ice and snow. There is also the added risk of theft, as cars left running with keys inside have frequently been targeted.
The RAC advises drivers to prepare in advance by keeping a proper ice scraper and de-icer to hand. Applying de-icer before scraping can speed up the process and reduce damage to the glass. Wipers should also be checked to ensure they are not frozen, as switching them on while stuck to the screen can damage both the motor and the blades.
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For those without commercial de-icer, a simple mixture of water and a teaspoon of salt, or a spray made from three parts vinegar to one part water, can help loosen ice. Drivers are also encouraged to carry spare supplies, as temperatures can drop quickly later in the day.
Improvised tools such as credit cards or CD cases should be avoided, as they can snap or scratch the windscreen. Above all, motorists are urged never to pour boiling water onto frozen windows, as the sudden temperature change can weaken the glass or cause it to crack.
