www.azdot.gov/i19signage http://tucsoncitizen.com/hot-off-the-press-release/2010/01/18/public-input-sought-for-new-signs-on-interstate-19/
www.azdot.gov/i19signage http://tucsoncitizen.com/hot-off-the-press-release/2010/01/18/public-input-sought-for-new-signs-on-interstate-19/