Don’t know where you are from, but most of Europe has had good public transport. Though it can always be better, so Europe is pushing further with for example the TEN project, and check some vids on YT.
Also, imo, there is no " one" right answer. No holy grail nor whatever. Most choices are incrementel.Usuallly It’s a shift of awareness, technology ( in a form) and culture, which hopefully leads to a better tomorrow. The difference is that the majority of the problems we face have no precedent. 8 bn humans worldwide is a first since for ever.