interesting read. Thank you. Denver is a city that has seen the cycle. I found this: http://www.denverstreetcars.net/history.htm
Some one told me that there was a conspiracy by the big three in Detroit - that they secretly or otherwise bought up the streetcars in Denver and other locations, thereby increasing demand for the personal automobile. I haven't been able to find an authoritative source on this yet - but who doesn't love a good conspiracy theory.