Buses and train cars are a small part of infrastructure, regardless of whether it's the only part of infrastructure certain information ecosystems speak to. But sure. $30 billion per year over many decades for those parts, in one city, provides pretty extensive systems that don't even make sense in smaller cities.

> I bet per capita buses and train cars are dwarfed by even cities well below the tiers

And I will find even smaller US cities with even better metrics.