A County Court judge has criticised both police and a driver who were involved in a fiery, expletive-laden exchange after the woman drove through a roadblock.

Linda Millazzo, 63, ran through a roadside operation at South Yarra, clipping a policeman, before she was stopped.

The officer involved called the lady a "f—— nutcase".

She pleaded guilty to obstructing police and driving in a dangerous manner.

In her pre-trial argument, a police tape of the confrontation, obtained by The Age, was played.

In it, Ms Millazzo claims she was suffering a heart attack at the time.

VIDEO: Linda Millazzo has an expletive-laden exchange with officers