A woman in her late 40s branded herself an "idiot" when she was caught driving at six times the legal blood-alcohol limit in east-suburban Blackburn on Wednesday night.

The woman, 48 and from Burwood, astonished police when she returned an evidentiary breath-test reading of 0.313 per cent about 8pm.

Her licence was immediately suspended for a period of 12 months and her vehicle impounded.

The woman allegedly admitted she was an "idiot" and "lucky she didn't kill someone," police said. She is expected to be charged on summons with drink-driving related offences.

Police are in the midst of a crackdown focused on reducing road trauma and improving behaviour on the roads.

The operation will run until January 7.

Police will home in on excessive speed, driver distraction, seatbelt non-compliance, fatigue, and drink and drug drivers.