The survey found that overall support for speed cameras is very high, at 79%, but high-mileage drivers – which includes both business and private drivers – are the least supportive with 70% approval.

Conversely, high-mileage drivers are the most supportive of speed awareness courses as an alternative to prosecution, with 77% approval. The average level of support from all drivers is 70%. But they are less supportive of plans to use the revenue from such courses to fund cameras – 38% of high-mileage drivers approve of using revenue from courses for this (48% for all respondents) and 42% actively disagree (34% for all respondents).

A total of 81% of all respondents and 79% of high-mileage drivers think that speed cameras have contributed to falling road death rates over the past decade. But support from high-mileage drivers is not as strong as with other groups, with a lot of this support consisting of "speed cameras help a little". They are also the least likely to think that injuries would go up if cameras in their area were switched off to save money, and the most likely to think that they'd stay the same.

The IAM says that with many high-mileage drivers likely to be driving on business, the survey highlights how more work needs to be done to dispel commercial drivers' negative perceptions of speed cameras.

IAM Drive & Survive head of training Simon Elstow added: 'It is reassuring to discover that so many high-mileage drivers recognise that training is the best solution to bad driving. These results show how seriously they take road safety.

'Whatever people's feelings are on speed cameras, we encourage everybody to respect the limits. Travelling at the right speed protects you and other road users and gives you extra time to react to unexpected hazards.'