I don't own a car anymore and haven't for two years now. I walk everywhere. Around 10 miles most days through the countryside and coast from town to town.
Healthiest I've ever been, I can eat what I want a lot of the time too. I've got basically no body fat and I have a ridiculous amount of energy. I feel constantly refreshed too, before I was lethargic and overweight.
I live in the UK however in a very pedestrian orientated location where I can do this without issue. Or get a bus or train if needed. I have absolutely no idea how it would be possible in a rural area or a car centric city. I guess it wouldn't be, and the people in charge are not willing to change.