Ключевые слова: alert, attention, background, black, caution, city, conditional, construction, copyspace, danger, dig, forbidden, graphic, gravel, ground, heap, industry, information, infrastructure, maintenance, obstacle, obstruction, outdoor, precaution, prohibition, reconstruction, red, repair, restriction, road, roadside, roadworks, safety, sand, side, sign, silhouette, site, sketchy, street, symbol, temporary, triangular, unavailable, urban, warn, work, yellow,