use of trailer construction vehicle
A trailer is generally an unpowered vehicle towed by a powered vehicle. It is commonly used for the transport of goods and materials.
Sometimes recreational vehicles, travel trailers, or mobile homes with limited living facilities, where people can camp or stay have been referred to as trailers. In earlier days, many such vehicles were towable trailers.
Commonly, the term trailer refers to such vehicles used for transport of goods and materials in construction or other related field.