US outdoor revenue up 5% in 2Q 2013

US outdoor advertising revenue rose 5% in the second quarter of 2013 compared to the same period in 2012 according to a Outdoor Advertising Association of America press release.  Outdoor industry revenue growth is impressive compared to 0% growth for the US radio industry during the second quarter and 2.5% growth for the US GDP during the same time period.  I suspect the growth in outdoor revenues is driven by firming rates as well as the installation of digital signs.