Another commenter shared Tokyo, and I can explain what they did:
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Tokyo as a whole made it extremely difficult to own cars. To own one, you need to prove to the government that you have a dedicated parking space. There's also a high tax on it and on insurance premiums. My Japanese friend told me how his family used to car share with the entire neighborhood. Uncertain if this is a Tokyo thing.
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Public transportation is ridiculous. You are always about a 10 minute walk to a subway or bus.
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Highways are underground, which encourages cars to get out of the street level.
The women I spoke with were between 30-45 years old.