Suffolk County police arrested 46-year-old Dawn Heller, of West Islip, on Sunrise Highway in East Patchogue around 11 p.m. Thursday.
No one was in the police car at the time, as the officer was helping with traffic control in a construction zone.
The woman was given a sobriety test at the scene and reportedly a blood-alcohol content twice the legal limit.
She was taken to Brookhaven Memorial Hospital for treatment of non-life threatening injuries.
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