Designer Walter Hood is now transforming street corners and highway underpasses into public spaces that are relevant, even meaningful, to the communities they serve: black and white and brown, rich and middle class and poor. They invest very little in the public realm, and that's sad, he says. Hood's success has come largely because he has learned to be a community whisperer, creating spaces that have elements the residents want before they even know it. Last year, Hood was commissioned to revitalize public spaces in Pittsburgh's historically black Hill District. As soon as he got the twin gigs -- the Garden Passage, a walkway with an art installation at the city's civic arena, and a neighborhood-wide plan called the Green Print -- he hosted a barbecue and did walking tours to get a sense of the community. Hood is putting a greater emphasis on green space.