The previous six installments of this series identified and explored, in considerable detail, the elements needed to make a public transportation system work. Not a hodgepodge of disjointed and sometimes overlapping or duplicative services. But a collection of system elements which fit together to form a coherent system. The goal of this series was not historical, although various installments note that every one of these elements was given serious consideration, often supported by a considerable number of articles and, often, substantial studies, in the late 1960s and early 1970s. In some cases, these elements were actually implemented, often as “demonstration
