Nincs bejelentkezve | Belépés | Regisztráció
No, it`s a billboard that was used for advertising. The idea was that at night it will light up, but it has been against Serbian laws so they never got advertisements and the buses are running with blank billboards.
Yeah, I agree. Regarding the billboards, this is how it supposed to look: http://web.archive.org/web/20111026172358im_/http://gspns.rs/images/r2.jpg