If you're planning a UK road trip this autumn, there's a seasonal hazard worth knowing about that has nothing to do with weather or traffic: deer. Motoring safety organisation GEM Motoring Assist is warning drivers that October to December is the highest-risk window for deer collisions, when the annual autumn rut (mating season) pushes deer across roads just as the evenings darken and rush-hour traffic peaks.

The numbers are striking. According to the British Deer Society, more than 40,000 deer are killed in vehicle collisions across the UK every year, and the RSPCA puts the resulting damage to vehicles at a minimum of £17 million annually. And it's not just a rural problem – deer regularly wander onto major A-roads and dual carriageways as they move between fields and suburban gardens, so even commuter routes carry risk.

James Luckhurst, GEM's head of road safety, points out that this is a predictable seasonal danger, but one that catches people out even on roads they know well. Deer can burst out of cover with almost no warning, and in low light you simply have less time to react.

So what should you actually do if a deer appears? The advice is clear: brake firmly if it's safe, but don't swerve. A sharp swerve can send you into oncoming traffic, off the road, or into a ditch – turning an animal strike into a far more serious crash. Your priority is staying in control of the vehicle.

Prevention matters too. Slow down in areas marked with deer warning signs, scan the road and verges ahead rather than just the car in front, and assume deer are most likely to cross at dawn and dusk – exactly the times many of us are driving to or from an airport, a cottage or a day out. Where you see one deer, expect more: they often move in groups, so if one crosses, ease off and wait a moment before accelerating.

For travellers hiring a car or taking their own vehicle on a countryside break this season, it's a simple bit of prep: build in a little extra time for darker evening drives, keep speeds sensible on unfamiliar rural roads, and don't treat that deer sign as decorative. It's there because the spot genuinely has a history of crossings.

A collision isn't just a risk to you and the animal – it can wreck a holiday, damage a hire car you're liable for, and leave you stranded on a dark country road. A few seconds of extra caution on a verge-lined A-road in November is a fair trade.

The Independent Travel