Ключевые слова: abstract, accident, alert, attention, backdrop, banner, barrier, black, border, caution, construction, crime, danger, design, diagonal, dirty, frame, graphic, grunge, hazard, hazardous, illustration, industrial, industry, isolated, line, old, pattern, police, risk, road, safety, security, sign, street, stripe, striped, symbol, tape, texture, textured, traffic, urban, wallpaper, warning, warning sign, yellow, zone,