“a difference if the woman is in the driver’s seat or the front passenger seat…”
Sure there’s a difference. A woman driving is definitely a lot more attracting then just being in the passenger seat.
I don’t think there’s any problem in woman driving in all issues including Tznius. But it depends what car though. If it’s a flashy colored car or 4 x 4 I think that’s wrong but a normal 5/7 seater car’s fine.