Ключевые слова: accident, accident prevention, alert, bank protection, bulletin board, caution, character space, civil engineering, civil engineering work, closed, construction, construction site, copy space, danger, dangerous, disaster prevention measures, earth and sand, emergency, equipment, landslide, message, notice, offlimits, outdoor, restoration, restoration work, road, road construction, safety, safety first, shore protection work, signboard, site, standing signboard, text space, traffic, under construction, warning,