by the road authorities. The reason behind the ban was that in an emergency the windows might need to serve as an emergency exit, and that the advertising would make the window harder to break with the emergency hammer. Gaia Trafikk argued against the ban, pointing out that their tests showed that the thin wrap had no impact on the breakability of the window, but did remove the advertising which covered the windows. See also Driven media Fleet media Mobile billboard Out-of-home advertising School bus advertising Truckside advertisement Wrap advertising References Advertising by medium Bus terminology