Ключевые слова: alert, attention, barrier, blockage, boundary, caution, cautionary, closed, constriction, construction, control, cordon, demarcation, detour, direction, diversion, emergency, fencing, forewarning, guideline, hazard, lineup, maintenance, marking, measures, obstacle, perimeter, precaution, prohibition, protection, red flags, red lines, regulation, restriction, road cones, roadwork, row, safety, sequential, signage, symbol, traffic, visibility, warning, zone,