Low flatbed semi-trailers are typically used to transport heavy-duty vehicles (such as tractors, coaches, special-purpose vehicles, etc.), rail vehicles, mining machinery, forestry machinery, construction machinery (such as excavators, bulldozers, loaders, pavers, cranes, etc.) and other heavy-load goods. The lower their center of gravity, the better their stability and safety, and the stronger their ability to transport oversized goods and pass overhead obstacles.