Ford owners are the most likely to take drugs, according to a new survey.

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BMW owners are more likely to drink and drive than other motorists and Ford owners are the most likely to take drugs, according to a new survey.

The survey, conducted by car brokers Private Fleet, canvassed the habits of 2,500 Australian drivers.

It also revealed that middle-aged Queensland women are statistically the safest drivers on Australia's roads.

As for which state has the worst and safest drivers, South Australia is home to the worst drivers on our roads, while ACT is relatively safe by comparison.

The study also found:

* The worst drivers are male P-Platers from NSW

* Male drivers of Ford motor vehicles in QLD are the most likely to drive after using illicit drugs, with more than two per cent admitting drug-driving.

* Overall, Holden was the choice of vehicle of the worst drivers on the survey, whereas Mazda came out on top as the having the best-behaved drivers.

* BMW driver took out the dubious honour of the worst drink-drivers, with 42 per cent admitting to having driven after drinking three or more standard alcoholic drinks.

* Honda drivers keep it straight with less than 33 per cent admitting the same.

* Speed freaks head for Tasmania, where nearly 50 per cent of drivers say that they have exceeded the speed limit by more than 30 km/h, whilst Victorians take their time as only 39 per cent putting their pedal to the metal.