A unified transportation system - encompassing everything (including but not limited to walking, rental bikes/cars, car pooling, trains, planes). One machine th

A unified transportation system - encompassing everything (including but not limited to walking, rental bikes/cars, car pooling, trains, planes). One machine that I tell my starting and ending points (down to the house number), and will make me a number of possible schedules and ways to get there using mixed modes of movement, and lets me pay for it/track it with one card. A clean and plentiful energy source that is widely distributed.