Developed at the request of the MexicanG20 Presidency for consideration by the Finance Ministersand Central Bank Governors at the G20 Leaders' Summitin Mexico, and jointly prepared with the Asian DevelopmentBank, this policy paper positioned green transport in thecontext of cities development. Urban transport determinesthe shape of a city and its ecological footprint. Manycities in low and middle income countries are at acrossroads. Policy decisions taken now, while car use isstill relatively low and cities retain a relatively transitfriendly, compact urban form, will affect how people willlive in their cities for many decades into the future. A newparadigm of urban transport can be part of the solution toreversing the deteriorating situation in some cities ofdeveloping countries, and supporting others to embark on asustainable, low carbon, green growth path: developing acity for people rather than cars, and including public andmass transport as a major component of the modal structure.Implementing such a new paradigm can be trulytransformational. This joint World Bank and AsianDevelopment Bank paper lays out six aspects, which are mostdifficult to align, yet, are critical to ensure thesustainability of urban transport systems, visionaryleadership, integrated strategy for land use and urbantransport, coordination among agencies, domestic capacity,adequate cost recovery, and private participation in theoperation and construction of urban transport systems. Thepaper proposes a set of new initiatives for G20leaders' consideration, including the development of anumbrella toolkit to guide policy makers in charge of urbanplanning to make transport decisions best suited to theirlocal contexts.