Do you get confused between a humpback bridge and an uneven road? If so, you're among the one in four people in the UK do not understand the meaning of road signs.

That statistic comes from the latest YouGov poll for the AA, which asked people to identify some basic ones.

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Almost everyone surveyed could identify the national speed limit sign with only seven per cent giving the wrong answer – most of those thought it meant 'no stopping at any time'.

However, it was the less common signs that seemed to trip people up.

Over a fifth of people surveyed were convinced the sign for 'uneven road' actually meant speed bumps and another 19 per cent reckoned it was to signify a double humpback bridge.

More than two-thirds of those surveyed could be putting cyclists’ lives at risk as they failed to correctly identify the sign for ‘cycle route ahead'.

Brian MacDowall, the secretary of the Kent branch of the Association of British Drivers was concerned but not surprised by the findings. He blames the size of the modern Highway Code.

He said: "All road users, whether you use vehicle, horse or cycle, should understand what road signs tell you in order to use the roads safely."

Mr MacDowall reckons drivers should undergo regular refresher training and blames cluttered junctions.

He added: "If you drive along our roads today, the amount of road signs and other information that wasn’t there 20 or 30 years ago shows the vast increase in the number of signs and I do sympathise with drivers having to take in the sheer amount of information."