Ключевые слова: ahead, america, american, area, attention, barrier, bump, canada, canadian, caution, closed, condition, construction, country, danger, ground, hazard, highway, information, north, orange, pavement, post, road, roadside, roadsign, route, rural, safety, sign, signage, signal, signpost, site, states, symbol, temporary, traffic, transport, transportation, under, uneven, warning, way, work, zone,