Ключевые слова: alert, attention, barrier, boundary, bright, build, caution, color, cone, construction, danger, design, drawing, equipment, forbidden, highway, icon, illustration, industry, isolated, many, marking, object, obstacle, orange, plastic, repair, road, safety, security, set, shadow, shape, sign, signal, site, stop, street, striped, symbol, traffic, transportation, under, warning, white, work,