I am very much anti-car but the extreme also concerns me. If you're not rich and all your options for transportations are public shared transportation and payment methods are non-cash and traceable then your freedom of movement is regulated by the state. In China for example, your movement using public transportation and even your ability to rent a bike is regulated by social score.

I need a constitutional amendement (US) that guarantees cash payments will alwayd be an option for any means of transportation, shopping for basic needs and communication methods. And that the 4th amendment's protections for search and seizure extend to public transportation and that the government must take an all or nothing approach to weapons on public transport, that is either allow all legal weapons or screen every single person using a public transport (like airports) for weapons.

I would also like to add that the federal government should be granted powers that allow it to override local governments' push back against public transport infrastructure (e.g. california!). Allow it to purchase any land for fair market prices and use eminent domain to remove people and endsure things like the cali rail project where rich localities get a stop but poor ones have little say doesn't happen.