I think it gets confusing because we start out talking about cities but we'd also like to include other areas that are overrun with cars in the conversation. Buses in Ghent and Paris aren't going to be navigating parking lots and cul-de-sacs, no matter how much car infrastructure is removed. We can free up a lot of room for bus stops, though, which helps keep buses moving smoothly.

Suburbs are either cities in their own right, or part of the whole city. It deoesn't make sense in this discussion to think of them as not part af the city: they cover too much of the population.