section_path: Forms of mass media/Outdoor media
section_name: Outdoor media
paragraph_text: Outdoor media
  
  Outdoor media is a form of mass media which comprises billboards, signs, placards placed inside and outside commercial buildings/objects like shops/buses, flying billboards (signs in tow of airplanes), blimps, skywriting, AR advertising. Many commercial advertisers use this form of mass media when advertising in sports stadiums. Tobacco and alcohol manufacturers used billboards and other outdoor media extensively. However, in 1998, the Master Settlement Agreement between the US and the tobacco industries prohibited the billboard advertising of cigarettes. In a 1994 Chicago-based study, Diana Hackbarth and her colleagues revealed how tobacco- and alcohol-based billboards were concentrated in poor neighbourhoods. In other urban centers, alcohol and tobacco billboards were much more concentrated in African-American neighbourhoods than in white neighbourhoods.