The poll of almost 1,500 drivers, carried out by Vision Critical on behalf of the IAM, also revealed that 54% of drivers admitted to missing a turning because they were distracted. A further 14% of drivers are quite often unable to recall any part of their journey in the car. 

Younger drivers (18-25 year olds) are the most likely to be in danger of distraction. A total of 35% stated they couldn't recall any part of their journey, often or quite often. In comparison only 5% of older drivers (65+) admitted to not remembering their journey. 

Driving on autopilot appears to differ by region too. In total, 22% of Londoners are less likely to recall any part of their journey, compared to only 11% of Scottish drivers, and 10% of drivers in the South West.

IAM chief executive Simon Best said: ‘It's all too easy to get behind the wheel and zone out completely. Being distracted enough that you miss a turning is a sign that driving is a task that has fallen too low in your brain's priorities. While we all have other concerns and stresses in our lives which can take precedence in our minds, the act of driving should remain your biggest priority when behind the wheel. 

‘The fact is it takes too long to react appropriately if you are not concentrating on driving. Being distracted can have serious consequences, it could mean that you're less likely to see that cyclist or child running out until it's too late.’

The IAM offers the following advice to keep you alert on the roads:

• Keep your eyes moving
• Make concentrating on the road ahead your main priority
• Roll down the windows for some fresh air

For longer trips:

• Plan your journey to include a stop at least once every two hours. If you feel drowsy, stop at the next service area and stretch your legs For longer journeys, where possible, share the driving with another driver Make sure you drink enough fluids.