mehaffy is a practicing urban planner and designer, with a key role in a number of noted projects including orenco station, a walkable mixed-use transit-oriented development on the portland, oregon light rail line. he has also been active in developing a number of urban design innovations including "sprawl retrofit," to help reconfigure sprawling, fragmented suburban developments into complete, walkable neighborhoods, and "generative codes," design codes that promote greater self-organization and adaptive form.