According to Sir Terry Farrell, MTR Corporation initially wanted a dispersed train station with discreet entrances, but he argued for a grand station hall concept with layered space oriented around Kowloon station providing a central focal point. Transport infrastructure occupies the underground level and first floor – loading facilities and platforms for MTR trains on the Tung Chung and Airport Express lines occupying the sub-terranean level; while the ground level has bus stations, parking garage entrances and mechanical rooms. The Elements Mall on the upper decks takes up , with retail space occupied by luxury brands, chain stores, a cinema, a supermarket, restaurants, and an ice rink.