This thesis will provide some answers to the question, “How can public transportation respond to the built environment to improve how we move within a city?” The typology for the examination of this problem is a light rail system, located in Phoenix, Arizona. The theoretical premise that is guides the research is, “public transportation must increase to improve how a society moves and functions in a built environment.” This thesis will explore connecting the Phoenix area, Los Angeles, Tucson, and Flagstaff with a High Speed Rail system to help revitalize Phoenix’s downtown. The project justification is, “To continue the growth of our built environment, we must put the public first, by studying the way a city moves, grows, and sustains.” Key words: Moves, Grows, Sustains