3 line 6 axle detachable gooseneck trailer are a form of double drop lowboy trailer that are designed to haul all types of heavy equipment. Ease and safety of loading are the primary features.  Loading over the rear of a trailer increases in danger as the equipment gets heavier, taller and wider. 

Detachable gooseneck allows the front of the trailer to detach. After the front of the gooseneck has been detached, a large piece of equipment like a tractor or excavator can be driven directly onto the trailer. After the equipment is loaded, the gooseneck is reattached and the equipment can be secured in place. This simplifies the process of loading and unloading.