Ключевые слова: alaska, america, american, area, attention, barrier, canada, canadian, car, caution, condition, construction, country, danger, federal, hazard, highway, information, kilometer, mutcd, north, orange, post, road, roadside, roadsign, route, rural, safety, sign, signal, signpost, site, states, symbol, tac, temporary, traffic, transport, transportation, trees, under, united, us, usa, warning, way, work, zone,