Ключевые слова: alaska, america, american, area, arrow, attention, canada, canadian, car, caution, closed, condition, construction, country, danger, excavator, hazard, highway, indicated, information, lane, left, north, orange, post, road, roadside, roadsign, route, rural, safety, sign, signage, signal, signpost, site, states, symbol, temporary, traffic, transport, transportation, under, united, us, usa, warning, way, work, zone,