Senior Sergeant Craig Dinnissen said police were called to Pine Hill Rd at 11pm on Friday, after a car hit a power pole.
It caused significant delays for trucks trying to head north out of the city, he said.
When breathalysed, the driver blew 820mcg.
Then at 2am, an off-duty officer saw a car go through a red light and driving dangerously in Corrie St, near the Town Belt.
When the driver was pulled over, they blew 871mcg, police said.