Alex Blei is a Program Scholar in the NYU Urban Expansion program. He is also a PhD candidate at the University of Illinois at Chicago in the Department of Urban Planning and Policy specializing in urban transportation. Most recently, he formed part of a team that used satellite imagery and historical maps to document global urban expansion over a 200 year period. Their findings were published as the Atlas of Urban Expansion. As an IGERT fellow he is shifting his focus from the macro to the micro level. Using GPS travel survey data, he seeks to understand how spatio-temporal analyses of travel behavior can inform individual decision making as well as planning and policy decisions. He has also worked as a transit planner in New York and Chicago.