Public Transit

I'm very interested in Public Transit.  Ann Arbor doesn't have the best public transit, but I am lucky to be able to enjoy the best of it.

Excel Spread sheet
How much does it cost to have 1 car for a year including everything except the gas?  Cost per trip?
How much does it cost to have a zip car?  Cost per trip?
All things being equal, all things aren't equal because a car is convenient?

If I could walk out my door, step into a waiting car and then be whisked to my destination or the next step up in travel (for speed or cost), that's obviously ideal.

Can the Ann Arbor Bus system 

It cost 22 dollars to go round trip to dearborn, takes more time, and is certainly less convenient.  Is downtown to downtown the new way to view things?  Seems retarded.  No, pubic transit has to change first.

Public Transit has to at least solve some problem or meet some need that isn't already being met.  In Europe, taking a car is more expensive and more restrictive.  Public Transit solves a problem.  Here, it doesn't.