Millions of UK drivers could be placing themselves and others at risk because they don't know the Highway Code, according to research.
A survey by the tyre manufacturer Goodyear quizzed 2,000 drivers on the rules and signs for Britain's roads.
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While almost half of those surveyed rated their knowledge of the Highway Code as either good or very good, the truth was considerably worse.
The survey found that 44 per cent of drivers did not realise a red and amber traffic light shown together meant stop; instead believing it meant proceed with caution.
Also worryingly, nearly three out of ten drivers deemed it unnecessary to stop at a zebra crossing if a pedestrian was waiting to cross.
It was also found that over a quarter of drivers couldn't correctly identify the no right turn sign, with one in seven mistakenly believing it meant the road up ahead on the right was closed.
Furthermore, one in six drivers surveyed said they simply ignored road signs when they didn't know what they meant.
Nearly a third of the drivers quizzed admitted they had failed their theory test at least once. Passing this test of course requires extensive knowledge of the Highway Code.
Also since gaining their licence over a quarter of the drivers who took part in the survey has been involved in a motor vehicle accident of some description.