I remember reading an answer here saying that it was forbidden (even for men) to drive a car. That one Rabbi used to forbid it. I tried to search it but I did not find it. Maybe someone can help.
R. Shimshon David Pinkus has a letter which is published in the end of Nefesh Shimshon on Emunah, where he very strongly discourages anyone from having a car and driving it on their own. I don't think that he objected to using public transportation or taxis though. (He also writes that while he himself has a car, his Rabbeim have told him that because of his job/position he's required to have one)
You are probably thinking of this question and answer. No one actually came up with a Rabbi there.