I do not think women (on their own) riding cars, motorbikes, and other means of transportation causes this kind of feeling you are describing here
In the pre-technology eraWomen used to ride camels, donkeys, and horses and we have not seen any documented evidence to show this is resulting effect.
In fact one hadith saysThe Prophet (peace and blessings be upon him) said: "
The best women who rode camels are the women of Quraysh. They are the best to show affection towards children and to care for their husbands' wealth."
So woman who rode horses or camel was never forbaddin by the prophet.
so it means there is no harm as long as they keep themselves decently dressed with good undergarments.
However- There is problem when a woman rides bike behind a man who's not her husband.
- Because this involves opening your thighs behind a man, which to me is
sitting inappropriately
NB: For Muslim ladies, this is forbidden.