Bus advertising descends from similar methods used on streetcars in the early 20th century.
Sized at approximately 2.5 by 6.5 feet, bus bench ads tend to be cheaper per unit than other forms of outdoor mass advertising.
Adverts are attached to the corners between the walls and ceiling overhead to catch the eye of passengers, in the same manner as used in rapid transit systems.
The most common technology is the LCD-TFT systems in different resolutions: 18.5" (also side-by-side panels 18.5" + 18.5"), 21.5" and stretched monitors in 29.4".
Additionally, adverts may be printed on placards known as boards, which are slotted into special guide fittings attached to the side of the bus.
[3] Some panel and full side and all-over adverts were traditionally painted on if the length of application warranted it.
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 latest bus advertising campaign by Adidas for the Brazil World Cup 2014 made use of full wrap and window coverage techniques.