twelveThe Walt Disney World Resort currently operates twelve Mark VI monorail trains on three lines of service. The monorail system opened in 1971 with two routes (Magic Kingdom: Resort and Express) and with Mark IV monorail trains.
Are there monorails in the US?
Many monorail systems run through crowded areas such as Detroit, MI. Aside from mass transit and people mover systems, a large number of smaller monorails have been built in amusement parks and at zoos.