Hi. Perhaps you came across references to the OPUS version of UrbanSim in a published paper? In any case, it is an older version that we no longer maintain. You'll find access to the current version here. If you want to access raw source code to use in your own research, you can head over to the relevant github repos and start coding: https://github.com/UDST/urbansim. If you are interested in the cloud platform that we have developed to support making this easier to use, you can read about the cloud platform on this website. We have developed three versions of the platform. One for census blocks, available within the United States. One for parcels, available to use anywhere there is sufficient data available. And one using zones, available for use anywhere. Here is a quick overview: http://www.urbansim.com/urbansim/
Paul
