Ключевые слова: branch, caution, change, control, cross, crossing, crossroad, danger, direction, dramatic, focus, form, horn, intersection, iron, journey, light, line, metal, octagon, pattern, pole, post, rail, railroad, railway, red, road, roadway, route, safe, safety, sign, signal, speed, steel, stop, stopping, street, track, traffic, train, transport, transportation, travel, warn, warning, way, white,