Ключевые слова: accident, advice, alert, asphalt, attention, avoid, beware, care, careful, caution, cautionary, concept, danger, dangerous, direction, emergency, first, health, help, highway, instructions, lines, mark, marker, precaution, prevent, prevention, protective, risk, risky, road, safe, safely, safety, safety first, secure, security, sign, street, symbol, text, traffic, transportation, unsafe, warn, warning, way, word, worry, yellow,