The Arizona Department of Transportation researched the history of the state’s transportation system from pre-Columbian times to the present. The resulting report can be accessed online. The report was also the basis for a full-color, photo-rich book published in honor of Arizona’s 2012 centennial — Arizona Journeys: How Transportation Shaped the Grand Canyon State. To purchase the book, contact the Arizona DOT Research Center at 602-712-4052.
~Thanks to Dianne Kresich for suggesting this post