The Mariposa project is on the front lines of a rapidly growing movement seeking to reconnect low-income residents to the critical networks — transit, affordable housing, jobs — that are the cornerstones of opportunity. By centering development efforts around a transit stop, planners are hoping to reinvigorate a neighborhood by connecting its residents to integral supports and services, from hospitals to schools to grocery stores , all while paying heed to the risks of gentrification and displacement.