The big thing seems to be population density. If you build massive suburbs with low population density then the only way to move around is by car. To big for a

The big thing seems to be population density. If you build massive suburbs with low population density then the only way to move around is by car. To big for a bike. Not enough density for public transportation. And then you get endlessly congested roads. The problem is that is quite expensive to build attractive apartment buildings that either have enough underground parking space for cars or you have to convince people to give up on having a car.