Last Turn Your Turn, Robert Rauschenberg

The mission of Nurture Nature Foundation (NNF) is to help in resolving what is possibly the most serious challenge the world faces today:
the intensifying conflict between the indispensable goals of environmental protection and economic development.

Balanced Transportation Analyzer

The Balanced Transportation Analyzer, or BTA, is an intricate spreadsheet model that ties together every facet of passenger transport in New York City including transit, auto and taxi. The model makes it possible to measure the effects of changes in auto tolls, transit fares and other policy levels on traffic levels, travel speeds, time spent traveling, agency revenues, emissions and other "externalities." It contains “pre-packaged” traffic-pricing scenarios which you may modify to test your own what-if scenarios. The BTA thereby offers a transparent and straightforward tool for transport policy-makers and advocates to test the impacts of tolls and other policy traffic pricing proposals.
See this video presentation explaining the BTA.
View this Powerpoint on it.
Or, best of all, run the BTA yourself by downloading it here.