When cities were first built they weren’t cities. They were just a collection of dwellings, usually next to a river, connected together by paths discovered by time through the compression of many feet. I guess you can still see those paths in the maze of many winding streets of the City of London. In this age, the dwelling was prime and connection was secondary and discovered. The city was starting to evolve.

As it evolved beyond a certain limit the disorder of the previous growth was replaced by a certain order. The planners stepped in and further growth was governed by these plans: land was becoming increasingly more expensive and the best use had to be made of that land. Instead of starting with dwellings (and this is more of a guess than an educated reasoning) the planners started with the connections: the roads. Before even the roads were mapped out the planners needed to understand the sort of traffic that would be on those roads dictating their width and construction. There would seem to be some sort of conversation between an abstract road plan and the type of dwelling that would be contained and connected by those roads.

Now, when new cities are built they always start with a road plan: the roads radiating out from the Arc de Triomphe, the grid plan of New York City . The dwellings fit into this plan.