Motorized vehicle door track assembly for a sliding door and method of assembly thereof

A motorized vehicle, comprising:

• a chassis;
• a plurality of wheels supporting the chassis;
• a plurality of tracks coupled to the chassis, the plurality of tracks including at least a first track assembly and a second track assembly;
• a vehicle door coupled to the chassis, the vehicle door adapted to move between a closed position and an open position, wherein the vehicle door comprises a first door mechanism assembly movably coupled to the first track assembly and a second door mechanism assembly movably coupled to the second track assembly;
• wherein, the first track assembly comprises a first track portion defining a first track surface, a second track portion, and a third track portion coupled to the second track portion, the third track portion comprising a top wall, a first side wall, a second side wall, and a lower wall, the lower wall defining a second track surface;
• wherein, the first track portion defines at least a first finger and a first groove in the first track surface, and the third track portion defines at least a second finger and a second groove in the second track surface;
• wherein, the first finger is disposed within the second groove and the second finger is disposed within the first groove such that the first track surface and second track surface are substantially coplanar.