Sneeze at the wheel and you drive unsighted for as many as 20 metres. And with hay fever now a seasonal presence, the effects of sneezing at the wheel are being highlighted.
Ford are doing so to draw attention to the new air filtration system on their Mondeo which, they claim, blocks 99pc of pollen particles.
But the topic is worth highlighting anyway because of one frightening fact: a sneeze while driving at 95kmh means you drive blind for 20 metres.
Research suggests a hay-fever attack could impair a driver to the same extent as a blood alcohol level of 0.04pc which is close to the legal limit in many countries.
It also claims that hay fever sufferers are 30pc more likely to be involved in a collision.