Ключевые слова: adult, adults only, backpack, bicycle, bike, biker, boston massachusetts, car, city, city life, color image, congestion, crosswalk, cycle lane, cycling, cyclist, day, europe, freedom, germany, hamburg, horizontal, leg, low section, man, massachusetts, motion, one man only, one person, one young man only, outdoors, past, people, ride, road, speed, street, traffic, traffic jam, transport, transportation, travel, truck, urban, usa, vehicle, young, young adult,