It's all about visibility...
Mobile Billboards - are a form of transit media and are ideal for events or political rallys as a truck, trailer or ute tray display. They are double sided and built on aluminium lightweight framing for ease of transport and use.
The advantage of using mobile billboards is they can move from one location to another, maximising the visibility of your advertising campaign to drivers and pedestrians. This is also achieved by parking in a central location where it remains visible to passers-by.
Fixed Billboards - 3mt x 6mt double sided billboard or 2.4mt x 1.2mt are standard sizes for roadside type advertising. These would be installed mostly on private property.
Big, bold and creative... fixed billboards provide spectacular and repetitive exposure to regular road users. They are an impactful and effective way of advertising.