There is a wealth of research on transit oriented developments and issues of equity and sustainability. To learn more visit the links below:
http://www.policylink.org/site/c.lkIXLbMNJrE/b.5136671/k.E606/Transit_Oriented_Development.htm
http://www.dukakiscenter.org/trnequity/
http://www.practitionerresources.org/cache/documents/674/67410.pdf
http://www.hud.gov/offices/cpd/about/conplan/pdf/preservingaffordablehousingNeartransit.pdf
http://www.hud.gov/offices/cpd/about/conplan/pdf/savingtransit.pdf
http://www.greencommunitiesonline.org/tools/transit_oriented_development/
http://www.mass.gov/envir/smart_growth_toolkit/pages/mod-tod.html
http://www.cityofboston.gov/DND/