Key Takeaways
Why Road Safety Myths Are Dangerous
Most drivers believe they're safer than average — a well-documented bias that road safety researchers call "illusory superiority." When that overconfidence is built on myths, the gap between perceived and actual risk widens. Some of these misconceptions are harmless. Others can put you, your passengers, and other road users in genuine danger.
The myth-busting below covers some of the most widely repeated driving "rules" that simply don't hold up to scrutiny. Whether you're new to driving or have decades behind the wheel, it's worth stress-testing what you think you know. For a look at how the same pattern plays out in car upkeep, see our guide to car maintenance myths.
Myth
Four-wheel drive (4WD) makes you safe to drive fast in snow and ice.
Fact
4WD improves your ability to move forward but does nothing to reduce stopping distances on slippery surfaces.
Four-wheel drive distributes engine power to all four wheels, which helps you pull away from a standstill or maintain momentum on loose terrain. It does not improve braking performance. Once you're moving, stopping is governed by tire grip and your anti-lock braking system (ABS) — not how many wheels are driven. Drivers in 4WD vehicles who speed on icy roads often find they can't stop any faster than a two-wheel-drive car, and may be travelling faster when they try. Reduce your speed and increase following distance in wintry conditions regardless of your drivetrain.
Myth
Hands-free phone calls are safe because your eyes are on the road.
Fact
Cognitive distraction from conversation — even hands-free — significantly slows reaction times.
Research consistently shows that talking on a phone while driving impairs reaction time in ways that mirror mild alcohol intoxication, even when both hands are on the wheel and both eyes are forward. The brain struggles to process the conversation and the driving environment simultaneously — a phenomenon called inattention blindness. This is distinct from talking to a passenger, who naturally adjusts the conversation when driving conditions worsen. Hands-free systems are less risky than handheld phones, but they are not risk-free. When possible, let calls go to voicemail and respond when parked.
Myth
It's fine to drive just a little over the speed limit — the risk is minimal.
Fact
Even modest increases in speed substantially raise both the likelihood and severity of a crash.
Speed limits aren't arbitrary. Physics determines that crash energy increases with the square of velocity — meaning a 10% increase in speed produces roughly a 21% increase in collision energy. At higher speeds, drivers also have less time to react to hazards and need more distance to stop. Studies from road safety bodies in the US and internationally consistently link even small speed increases above posted limits to higher fatality rates. Posted limits also account for road design, pedestrian activity, and sight lines — factors that don't disappear just because traffic is light.
Myth
Flashing your headlights to warn other drivers of a speed camera is a public service and perfectly legal.
Fact
Legality varies by US state, and courts have ruled differently on whether this constitutes a protected act or unlawful interference.
Some drivers consider headlight flashing a form of community courtesy. However, laws around this differ significantly across states. In some jurisdictions it has been treated as obstruction of law enforcement; in others courts have found it is protected expression. Beyond the legal uncertainty, warning drivers to slow only for a camera doesn't address the underlying safety problem of speeding — and a driver who brakes suddenly upon seeing the flash can create its own hazard. If you're unsure of the rules in your state, the safest approach is to avoid the practice.
Myth
You can safely drive through a flooded road if the water looks shallow.
Fact
Flood water depth is extremely difficult to judge visually, and even shallow fast-moving water can displace a vehicle.
Just six inches of fast-moving water can knock an adult off their feet, and roughly twelve inches can carry away a small car. Road surfaces beneath floodwater may be damaged or missing entirely — making apparent shallowness meaningless. Most flood-related driving deaths in the US occur when drivers attempt to cross roads they judged passable. The guidance from emergency management agencies is consistent: turn around, don't drown. Never attempt to cross flood water on foot or by vehicle if you cannot confirm the road surface is intact and the depth is safe.
Myth
Bigger, heavier vehicles are always safer for their occupants in a crash.
Fact
Vehicle safety depends heavily on design, crash ratings, and the type of collision — size alone is not a reliable predictor.
While a heavier vehicle does have a mass advantage in a collision with a lighter one, this doesn't mean all large vehicles are safer. Older or poorly rated SUVs and trucks may score lower on government safety tests than modern mid-size sedans. Rollover risk is also higher in taller vehicles with a higher center of gravity. The most reliable guide to vehicle safety is standardized crash test ratings from bodies such as the NHTSA and the Insurance Institute for Highway Safety (IIHS), not curb weight. When evaluating a vehicle, check its actual ratings rather than relying on size as a proxy for safety.
Building Better Habits From Here
Recognising a myth is only the first step — replacing it with accurate, practiced behaviour is what actually reduces risk. A few principles worth anchoring to:
- Adjust your following distance for conditions. The two-second rule is a minimum in dry conditions. Rain, fog, and fatigue all demand more space. Our article on why tailgating is more dangerous than most drivers realise breaks down exactly why that gap matters.
- Check your dashboard regularly. Warning lights are your car's way of flagging problems before they escalate. Your car's warning lights, decoded explains what each symbol means and when to act.
- Different roads need different mindsets. Motorway driving and city driving carry distinct risks. See our motorway vs. city driving breakdown for a practical comparison.
- Know the tricky scenarios. Merging, roundabouts, and blind spots catch even experienced drivers off guard. Our guide to navigating tricky everyday situations offers clear, actionable technique.
Don't Substitute Confidence for Preparation
Feeling comfortable behind the wheel is valuable, but it can also make drivers less vigilant about genuine risks. Overconfidence is a known contributor to road crashes across all experience levels. Periodically reviewing your habits — especially after long gaps without driving or when encountering unfamiliar conditions — helps keep real-world awareness sharp.
Driving safely isn't about perfection — it's about continuously updating what you think you know and staying honest about the risks involved every time you get in the car.