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The RAC Foundation conducted research in London and Glasgow. They discovered that around one in ten car drivers failed to obey a red light.

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The figures were even worse for bus drivers: around one in five rumbled through a red.

And one in two of all London cyclists ignored red lights, even though they are probably the most vulnerable of all road users. Those in Glasgow were rather better behaved: only one in four failed to stop.

The RAC says the survey shows what happens when drivers get frustrated by traffic jams:

"Growing congestion is frustrating for all road users. It makes them late," says the RAC Foundation's Kevin Delaney.

"This may increase the temptation to ignore red traffic lights, but it is dangerous and a foolish way to beat the clock.

"However, it seems that an increasing number of drivers and cyclists are putting their safety and that of other road users, especially pedestrians, in jeopardy by risking it at traffic lights.

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