A vehicle door assembly includes a vehicle body structure, a first door, a second door and a support assembly. The vehicle body structure has a wall portion that defines a door opening. The support assembly is fixed to the wall portion proximate the door opening and has at least one pair of tracks with door support devices and a motorized door mechanism. The door support devices independently support the first door and the second door for movement along the at least one pair of tracks and the motorized door mechanism is configured to raise and lower the door support devices along with the first door and the second door from respective closed orientations covering corresponding sections of the door opening and open orientations exposing the corresponding sections of the door opening.