Ключевые слова: access, ahead, alert, background, barrier, block, blocked, boundary, caution, close, closed, danger, dead, end, entrance, equipment, forbidden, highway, illustration, information, isolated, message, metal, no, nobody, notice, obstacle, obstruction, outdoors, pattern, protection, red, road, roadblock, roadsign, safety, sign, signage, signal, single, square, stop, street, symbol, traffic, transport, transportation, travel, urban, warning,