Sustainable Urban Development at Columbia University in the city of New York. A political scientist by training, her research focuses on urban land-use, transportation, planning and policy in Africa, particularly in Kenya. She is a founding member of the DigitalMatatus consortium which has produced the first open transit data and public transit map for Nairobi's "matatu" transit system and runs the blog nairobiplanninginnovations.com. She is also a founding member of CairofromBelow.