Ключевые слова: adult, bicycle, bike, boy, capital, carnival, celebration, children, city, clothing, community, commute, costume, crowds, cycle, cyclist, day, dress, emission, environment, event, fancy, festival, freedom, fun, gathering, girl, group, happy, hat, health, helmet, highway, holiday, kid, london, masquerade, party, people, person, race, ride, rider, road, rubber, speed, street, transport,