or a scheme applied to the entire exterior, known as an 'all-over advert' bus. A variety of formats are available to marketeers, although the most commonly used media formats are: T-sides Supersides Streetliners Rears & Mega Rears (Bus backs) Full Wraps There are different options available to these formats in London because of the city's iconic, Double-decker bus. Advertisers looking to promote a message can also make use of these formats which include: London Gold Frame Route Master Depending on the size of the bus and its location, further creative can consist of: Coving Panels & Bulk Heads Super Squares Upper Bus Rears Technologies Some panel and full side and all-over adverts were traditionally painted on if the length of application warranted it. This would require a reasonable longevity and cost implication for advertisers, due to the requirement to take buses out of service to apply and remove paint schemes. Frequently changed panel adverts would use replaceable boards. With the advent of adhesive vinyl technologies, this allowed adverts to be rapidly applied and removed over the top of the buses exterior paint as decals, reducing the cost and time. The invention of see-through graphics, most commonly applied as a self-adhesive perforated window film, allowed the creation of more elaborate designs that could be applied over windows (although for safety reasons not the front window), moving away from the traditional square box design approach to adverts. With the advent of partially transparent window coverage techniques, all over adverts have been applied as a full vehicle advertising wrap windows and all. The transition from screen printing to digital printing has seen an increase in the color range and complexity of advert designs. The latest bus advertising campaign by Adidas for the Brazil World Cup 2014 made use of full wrap and window coverage techniques. Transport for London launched the new formats as part of its ‘year of the bus’ celebrations, which commemorates the 60th anniversary of the Routemaster bus and the 100th anniversary of the first mass-produced motorbus. Campaign and promotion buses In addition to public transport buses, all-over advert buses are often privately hired specifically for a special promotional use, such as a political campaign or specific product promotions. These will often make use of open top buses to allow the interaction of the campaigners/promoters with the public. Legal issues In Norway, the use of wrap advertising on buses was prohibited