Something must be in the water. In the last week I've received about 5 or 6 requests for information on this model. Not sure why it's happening now, but I'm happy to oblige as best I can.
I first made this model back in late 2009, looking at SOM's Transbay Transit Center, as we were developing some of the adaptive components functionality. Unfortunately the model was in a weird, mutant, partially developed state, so I couldn't pass it around.
I'd love to do a step by step tutorial on how to make it, but I can only get around to rebuilding it, then playing back the process for your viewing pleasure. So, jack into the matrix, keep your hand on the pause/rewind, and see what happens!
Download the resulting file from here