Part I: The Ghost of Transportation Past

Behold the works of Alfred Beach and the history of New York City's rapid transit system.

Part II: The Ghost of Transportation Present

Quadracycles, which look rather like rickshaws, and Toyota's new "joint vehicle," which looks a little like a mechanized camel.

Part III: The Ghost of Transportation Yet to Come

Self-navigating vehicles!

Stratellites! (not transportation, technically, I suppose, but they have a very dirigiblesque air to them)

Skysails!