Ключевые слова: ahead, alert, attention, background, beware, black, caution, construction, danger, graphic, graphics, hazard, icon, illustration, images, industry, information, isolated, metal, notice, orange, picture, pictures, red, risk, royalty free photo, safety, security, sign, signs, stock image, stock photograph, stock photographs, stock photos, street, symbol, transportation, triangle, warn, warning, warnings,