I just thought of one very interesting exception from the above list, and that is Morgantown, West Virginia. It deserves an asterisk, because technically I don't think it runs on rails, and the cars are essentially just big enough for a moderately sized family... but it's still, for all intents and purposes, in the same category as the Jacksonville people mover.
https://en.wikipedia.org/wiki/Morgan..._Rapid_Transit
