Ключевые слова: arrow, asphalt, attention, background, caution, current, danger, dangerous, direction, dirty, electric, electrical, electricity, energy, gray, grunge, hazard, high, icon, industrial, information, label, lightning, line, metal, old, pavement, power, right, risk, road, rough, rust, rusted, rusty, safety, security, shock, sign, street, surface, symbol, texture, traffic, urban, volt, voltage, warning, way,