Ключевые слова: abstract, airport, architecture, background, business, center, city, design, down, elevator, escalator, escalators, floor, glass, indoor, indoors, inside, interior, lift, light, mall, metal, modern, motion, move, moving, office, people, perspective, speed, stair, staircase, stairs, stairway, steel, steps, subway, technology, transport, transportation, travel, up, urban, vertical,