Transit advertising is typically advertising placed on anything which moves, such as buses, subway advertising, truckside, and taxis, but also includes fixed static and electronic advertising at train and bus stations and platforms. Airport advertising, which helps businesses address an audience while traveling, is also included in this category. Municipalities often accept this form of advertising, as it provides revenue to city and port authorities.
Street furniture is made up of formats such as bus shelters, newsracks, mall kiosks, and telephone booth advertising. This form of outdoor advertising is mainly seen in urban centers. Additionally, this form of advertising provides benefits to communities, as street furniture companies are often responsible for building and maintaining the shelters people use while waiting for the bus.
Sources: Wikipedia.org Out of Home Advertising