Abstract: A self-loading and unloading truck trailer rig assembly wherein the cargo truck driver's cab comprises a split configuration mounted at one end of its chassis and a forklift mounted at the other end of the chassis. The mast of the forklift is pivotally mounted to the other end of the chassis and is arranged to lie on top of the chassis longitudinally thereof when the cargo truck is in transit on the highway and is movable to extend laterally of the chassis at its other end when the cargo truck is disconnected from its trailer and is serving as a forklift. When the cargo truck operates as a forklift, a part of its driver's cab is rotated 180 degrees to the rear of the chassis for operator control of the movement of the forklift and cargo truck.