Ключевые слова: activities, asphalt, background, bicycle, bike, biking, city, cycle, cycling, direction, ecological, exercise, gray, ground, health, healthy, lane, light, lines, marks, outdoor, paint, pathway, pavement, ride, riding, road, roadsign, route, safety, sign, signal, sport, street, sunlight, symbol, track, traffic, transport, transportation, travel, urban, vehicles, way, wheels, white,