Ключевые слова: ahead, alert, arrow, asphalt, board, concept, countryside, danger, direction, footpath, grass, gravel, health, highway, information, lane, lanes, life, lines, logo, nature, pathway, pole, post, road, road sign, roadsign, roadway, rural, safety, shadow, shield, shoulder, sign, signpost, sky, street, street sign, symbol, thailand, traffic, transport, transportation, two, two ways, urban, vehicle, vs, warning, way,