Ключевые слова: alert, area, attention, barrier, beware, building, caution, construction, construction site, danger, dangerous, fence, fencing, forbid, forbidden, hazard, hazardous, industrial, industry, information, keep, keep out, maintenance, no entry, perimeter, prohibited, repairing, restricted, restriction, risk, safety, security, showing safety, signage, site, traffic, unauthorised, unauthorized, unsafe, urban, warn, warning, work, worker safety, working,