Drivers waste more than a day a year using their sat navs

 Motorists waste the equivalent of 29 hours every year using sat navs, a study has concluded.

The time is lost when the devices send drivers either the long way or wrong way to their destinations, according to a report commissioned by the taxi-hailing app Mytaxi.

The figure is based on analysis of the proportion of journeys delayed by sat nav misdirection and the average length of the delays.

A poll of 2,000 drivers revealed that 27 per cent cite confusing directions as the most annoying aspect of sat navs. Almost half (47 per cent) of those surveyed have had a “verbal disagreement” with their device, while 31 per cent admit to shouting at it “as if it was a real person”.

The majority (52 per cent) of respondents admit they pay little attention to road signs and landmarks once a sat nav is leading the way.

Andy Jones of Mytaxi said: “Sat nav technology is undoubtedly a huge help to many people, but it is certainly not flawless.”