Ключевые слова: accident, alert, attention, barricade, barrier, border, boundary, build, building, caution, cone, construct, construction, danger, equipment, forbidden, highway, icon, illustration, industrial, industry, line, maintenance, marking, object, obstacle, orange, plastic, protection, red, reflection, repair, road, roadblock, safety, security, sign, signal, site, stop, street, striped, symbol, traffic, traffic cone, transportation, warning, work,