Ключевые слова: alert, asphalt, attention, bicycle, bike, bikeway, car, careful, caution, concept, cycle path, cycle track, cycleway, danger, drive, dutch, environment, europe, green, highway, holland, info, information, message, metal, naturally, nobody, outdoor, road, road sign, roadside, roadway, route, rural, safety, sign, signage, signpost, street, symbol, track, traffic, trail, transportation, travel, warning, way, yellow,