Ключевые слова: abstract, amsterdam, arrival, backgrounds, basement, business, california, care, city life, color image, concepts, connection, copy space, corridor, direction, empty, factory, flooring, guidance, healthy lifestyle, high angle view, horizontal, ideas, illuminated, indoors, industry, inspiration, italy, leaving, netherlands, no people, panoramic, pedestrian, pointing, prevention, protection, rules, safety, sign, signing, symbol, technology, transportation, usa, virus, yellow,