Found this place on the UER public database. I had no idea there were train tracks on Oahu even though I grew up here.
Tracks and cables.
Correct me if I'm wrong, so apparently these are called "derails", used to direct trains to the correct track. Tried to operate this while visiting, it was SUPER hard to turn since it was all old and rusty, but it was still usable.
Here's another one of those derails, smaller, but easier to use. (a lot easier to turn)
Inside of a passenger train (?????)