Even the map keys don't make sense with this thing. By looking at it, they either have 90% of it uninstalled, or 99% of it installed, with one piece left.....or something. Hell, I give up.
Anything with a red outline is not been constructed yet - So both inverted drops and the first lift hill need doing. Every other bit of track is built and the rest is colour coded so you know what sections are what. There is still one Marmaliser leg left to be constructed, The Hypnotiser leg.