An observant police patrol asked the woman to pull over on Baron Rålambs Väg, close to Stockholm University, at 8.20pm.
When tested, the women was found to have a blood alcohol content of 0.02 percent. She said that she had drunk two glasses of wine earlier in the evening.
“If she’d had a bit more alcohol in her blood we would have taken her driving licence immediately. But there’s a risk that the county administrative board will take it later anyway,” said police spokesman Torgny Wallström.