Morton O'Kelly, professor of geography and divisional dean for the social and behavioral sciences at The Ohio State University College of the Arts and Sciences, is fascinated by how things and people get from one place to another. He discusses whether Columbus is a more efficient city than San Diego or Las Vegas and if airlines that use point-to-point versus hub-and-spoke networks save or cost you money. Listen to this week's Voices of Excellence, available on Soundcloud and iTunes, with an excerpt airing tonight, September 18, at 8 p.m. on WCBE, 90.5 FM.