Ключевые слова: alert, attention, awareness, background, blue, caution, clear, communication, context, design, direction, element, emergency, emphasis, exclamation, expression, feature, graphic, guide, hazard, icon, indicator, information, informative, layout, mark, message, nature, notification, outdoor, point, precaution, professional, protection, public, risk, road, safety, setup, sign, signage, sky, standard, symbol, traffic, visibility, visual, warning, warning sign,