Ключевые слова: attention, background, barrier, caution, controller, crossing, crossroad, danger, direction, electric, electrical, equipment, fence, flash, forbidding, gate, green, illuminated, industry, infrastructure, iron, journey, lamp, landscape, line, long, machinist, metal, public, railroad, regulations, road, roadway, rules, safe, safety, semaphore, sign, steel, stop, stoplight, sunset, track, transport, urban, wait, warning, way, wreck,