A Truck Mounted Crane is simply a type of miniaturized crane that is small enough to be mounted into the bed of a pick up truck or a tractor trailer or similarly sized vehicle. When you have a smaller, much more portable crane, it is much easier to move and maneuver it around a construction space. Particularly if you are on soft terrain such as mud or sand. A bigger crane with treads or tracks might get stuck in the mud or other soft ground, but a pick up truck can get through it. Truck cranes are important to construction.