Ключевые слова: background, bicycle, bike, bikeway, city, clean, color, cross, cycling, danger, day, dont, electric, equipment, evening, forward, green, horizontal, infrastructure, lamp, lane, light, night, nobody, object, outdoors, plastic, protection, ready, red, road, safe, safety, semaphore, sign, signal, single, sport, street, symbol, traffic, transport, transportation, travel, urban, view, walk, warning, way, wheel,