A passenger transport carrier includes a lower frame having a first end and a second end, and an upper frame having a first channel defined therein, a first end, and a second end. The carrier also includes a rear frame extending from the second end of the lower frame to the second end of the upper frame. The carrier further includes a first upper seat support including a cross-member extending transversely across the carrier and having a first end and a second end, and a first elongate member extending from the first end of the cross-member of the first upper seat support and slidably received within the first channel of the upper frame. The first upper seat support is configured to move between a first seat position and a second seat position.