Ключевые слова: accessible, america, american, architecture, avenue, black, building, capital, child, city, columbia, crowd, day, daytime, dc, district, diversity, downtown, event, everydey, facade, families, group, haste, hotel, house, life, lives, male, man, metropolis, outdoor, pavement, people, road, scene, sidewalk, states, street, streetscape, traffic, travel, united, urban, us, usa, washington, washington dc, wheelchair, youth,