lifted by a traveler trolley unit 200 is released from its locked position and lift mechanism 230 is free to raise and lower when the traveler stops lifting lever 140 trolley unit 200 locks into place at its current position operation of release lever 140 is described below with reference to fig9 reference is made to fig2 which is a simplified front view of the luggage with the integrated trolley in a stowed position in accordance with an embodiment of the present invention in accordance with an embodiment of the present invention fig2 shows that trolley upper body 210 and trolley lower body 220 rest together compactly along an outer surface of luggage unit 100 when trolley unit 200 is folded for convenient stowage of the trolley when it is not in use in accordance with an embodiment of the present invention folding of trolley unit 200 is performed by locking the trolley unit into place when lift mechanism 230 is lowered as much as possible as seen from the relative positions of the faces a b and c the luggage in fig2 is rotated 90 u00b0 and flipped vis u00e0 vis the luggage in fig1 since the luggage of fig2 rolls along luggage wheels 130 whereas the luggage of fig1 rolls along trolley wheels 250 it will be appreciated.