I think many will still have cars, although they'll have to be electric [0]. Will the driverless car be as cheap as the second hand Nissan Leaf? Also, perhaps the car isn't used to commute every day when the weather is good and you aren't battling through traffic.

In Europe cycling distance to work within a city is as quick as driving. If you aren't quite fit enough you can get an electric bike (very popular amongst the elderly).

I didn't consider the suburbs in my question but in a small to medium sized city (<0.5m) I'd suggest the average commute would be ~8km. That takes ~25mins on a bicycle. Now project a better micromobility infrastructure and cycling looks much more attractive. All those school runs just vanish.

So you'd have to rich and fat to still be driving. ;)

[0] https://www.theguardian.com/world/2019/may/03/amsterdam-ban-...