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Sat navs costing drivers one full day per year by sending them the wrong way

Unreliable sat nav devices are leading drivers astray to the point where they lose approximately 29 hours a year taking inefficient routes, according to a new study.

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 black cab app mytaxi.

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

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 “switch off” and pay little attention to road signs and landmarks once a sat nav is leading the way.

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

“The results can be both frustrating and comical, as evidenced by the huge number of misadventures we have recorded.”

Councils claim lorry drivers should be banned from using sat navs designed for cars after a spate of heavy goods vehicles causing chaos on routes where they exceeded the weight or height limit.

The Local Government Association, representing councils in England and Wales, wants legislation brought in to make it compulsory for lorry drivers who use sat navs to use commercial devices which include information on bridge heights and narrow roads.

A historic bridge in Marlow, Buckinghamshire, was closed for months after it was driven over by a lorry more than 10 times heavier than the structure’s weight limit in September last year.

Residents in Bridgnorth, Shropshire, reported chaotic scenes in October last year when a lorry got stuck after being driven through the town’s main shopping street.

From 4 December 2017, learner drivers will have to safely use sat navs to pass their driving test as part of a major overhaul of the assessment.

Transport minister Andrew Jones claimed the measure will help save lives and ensure the test is “relevant in the 21st century”.

Galileo, Europe’s GPS rival said to be far more accurate than its American borne rival, launched last year.

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