"Smart sprawl is a suburb of any density that has been retrofit so that residents can shop, obtain services and work (at least a day or two a week) all within a mile or two of their home, and where those relatively short trips are completed using transit or vehicles that do not consume gasoline or other carbon-based fuels.
Smart sprawl is a way of reducing dependence on high performance automobiles while growing local economies in suburban neighborhoods and villages in every metropolitan area, regardless of density. Smart sprawl can be implemented in a short time frame at less cost than existing transportation and economic strategies. Unlike smart growth, smart sprawl does not require extensive new construction of buildings or rail systems."
Thanks to Chris Steins