I should have been more clear to say that the monorail wasn't completely without pillars, but it did have large sections of track that didn't have enough pillars. I no longer have the saved games from Tokyo that had a much longer stretch of unsupported track than this screenshot, however I found this within a few minutes of playing. At the very least it does demonstrate what I said about programming elevated track and pillar positioning and spacing.
http://cloud-2.steampowered.com/ugc/597000291551340539/AB93F58736FC0B5069CE8F29D1F3660EFD70436D/
