As many as 20 per cent of motorists believe they will never get caught exceeding the speed limit, a report from the RAC showed.
Around one in seven drivers say the benefits of breaking minor driving laws far outweigh the risks of getting caught. But 23 per cent say they would bend driving laws less frequently if there was more chance of the law catching up with them.
Despite so many motorists admitting to speeding, 62 per cent accept that it is a serious offence, with about the same number supporting the idea of more traffic police and speed cameras that photograph the driver.
Nearly half would welcome a 20mph speed limit in built-up areas, with 60 per cent wanting to see the limit reduced to 10mph near schools and parks.
Also, 25 per cent would like driving licences to be immediately confiscated from those caught driving more than 15mph over the limit, while 25 per cent think a one-year driving ban should be imposed on speeders.
The figures came from an RAC report on motoring which was based on the views of 2,029 British motorists.
The report also showed that 14 per cent admitted to driving when tired and going through a red light, while 18% had succumbed to road rage and 16 per cent had tailgated.
RAC road safety consultant Robin Cummins said: "There's been great progress over the last 20 years in highlighting the problems of drink driving but more needs to be done to tackle motorists driving too fast. Speeding needs to become socially unacceptable if drivers are to change their attitudes to this potentially lethal habit."
He went on: "Too many drivers take a blase approach to speeding, seeing 30mph signs as targets, not limits."