Buy Every American an Electric Moped

And use a standardized swappable battery design.

https://electrek.co/2019/09/23/check-out-gogoros-giant-new-b...

Not sure what the best plan for dealing with foul weather would be, what with storms and snow? Domed cities? Enclosed roads?

Homeless could have something like: https://www.designboom.com/design/cornelius-comanns-bufalino...

I recently visited Shanghai. Mopeds are the primary mode of transport, but gas mopeds are banned. Compared to some other moped-heavy cities that I have visited, it was a huge improvement to the smell and noise.