I switched also a couple of countries until now and I lived for about three years in a 4 million inhabitants city. I know exactly what you're referring to about public transportation in such cities and the way you move in small towns an villages. Now I'm back in my hometown and I actually sold my car last year as I used it less and less. I choose the bike or I walk more than I could imagine.
Btw...You're posts are great, but undervalued. At least in my opinion. Keep up with the good work!