A mobile advertising trailer is a billboard on a towable chassis. The 2.0 m display body is mounted on a rust-resistant galvanised or powder-coated frame, with built-in display lighting and provision for moulded 3D graphics on the display faces, so the board keeps working long after the sun has gone down.
The economics are what sell these. A static billboard costs a monthly site rental in a position somebody else chose, and it works for the traffic that happens to pass it. A trailer costs once, and it goes where your customers are on the day: outside the mall on Saturday, at the show on Wednesday, at the site boundary for the length of the build.
The chassis is specified to stand outside permanently, because that is what it will do. Galvanised or powder-coated finish resists the corrosion that starts at every weld on a painted frame left in the weather. Built-in display lighting means the face keeps working after dark, which is when a good proportion of the traffic passes it.
The provision for moulded 3D graphics rather than only flat vinyl is worth understanding. A flat wrap reads as an advert. A raised, shaped element reads as an object, and people look at objects. It costs more at the graphics stage and it is the difference between a board that is seen and a board that is passed.
Retailers, property developers, dealerships, political and awareness campaigns and event promoters buy these. Most are ordered with a specific site and a specific campaign in mind, and the body is regularly built to a customer’s own dimensions rather than the standard 2.0 m face. If that is the case, tell us the artwork size before the frame is cut.