Police will begin a world first trial targeting bad drivers who have had at least two serious traffic infringements or charges in the past two years.

These offences include speeding more than 10km/h over the speed limit, using a mobile phone while driving, not wearing a seatbelt and drink or drug driving.

WA Deputy Police Commissioner Stephen Brown told Steve and Baz this trial is about holding drivers accountable for their actions and reducing the road toll.

The Deputy Commissioner said it will cost $10,000 ‘if by some chance we save one life or reduce road trauma, what a great outcome’.