Just about everyone who drives any distance has a horror story to tell of the dangers of over-tiredness: of eyes growing heavy, concentration slipping, sometimes even head nodding, and coming round to find the car swerving between the lanes.

It is a nightmare which all of us dread. Often luck is on our side and an important lesson is learned, but for too many drivers it can lead to an accident and sometimes to death - though not necessarily the death of the over-tired driver, because an out-of-control vehicle can wreak terrible damage on other road users.

So the campaign alerting motorists to the dangers of driver fatigue is very welcome - particularly in West Yorkshire which contains one of the busiest stretches of motorway in the country, the M62, making it fitting that the campaign should have been launched at the Hartshead Moor services at Cleckheaton.

The campaign is particularly important given new research which shows that one in ten accidents on all roads is a consequence of driver tiredness. Police estimate there have been 246 fatigue-related incidents in West Yorkshire in the last five years, 56 of them serious.

So it is important that all motorists appreciate the early signs and learn to behave responsibly when they spot them, by pulling off the road for a rest. But it is important, too - as the AA has pointed out - that "business motorists" are not put under pressure by the schedules set for them by their companies to drive too long and too far and put themselves and other road users at risk.