“Streets are the primary structural unit of a city just like a column grid is to a building. Forty years from now we might decide to change this lecture hall to a cafeteria, but the one thing we are not going to move is the columns. Because if we move those columns, the building collapses. Streets are like that. Once they are built they tend to stay with us for a really, really long time, and they shape and form the nature of the city itself. They give form to it." - Doug Allen, "History of Urban Form 01."