Ключевые слова: caution, conceptual, control, controller, cross, crossing, crossroad, danger, direction, electric, electrical, equipment, flash, illuminated, industry, infrastructure, iron, journey, lamp, light, line, long, metal, public, rail, railing, railroad, railway, red, road, roadway, semaphore, sign, signal, sleeper, station, steel, stop, stoplight, track, traffic, train, transport, transportation, travel, urban, wait, warning, way,