Acting star Joseph Fiennes is the voice of a new Government campaign launched today to remind motorists of the dangers of driving when tired.
Tired drivers cause one in five of all crashes on major roads but research shows many motorists are ignoring the simplest sign - the common yawn - that it's time for a break.
Road Safety Minister Jim Fitzpatrick said: "We all want to finish our journeys as quickly as possible but being tired at the wheel is a proven killer that we cannot ignore.
People who drive for work are particularly at risk but there are simple steps we can all take to make our journeys safer. Plan regular stops into a long trip and if you find yourself yawning pull over and take a break - this could make the difference between life and death.
A You Gov poll of British drivers announced today shows only 18% of motorists always take a yawn as a sign to pull over.
Apparently we read a yawn all-wrong. Yawning quite simply means you're on the road to falling asleep - so if you're yawning behind the wheel it really is time to pull over.
I thought it was because of boredom as another driver cuts me cup!
FemaleFirst Jackie Violet