Ключевые слова: accident, alarm, alert, attention, blue, car, careful, caution, communication, company person, crossing, danger, dangerous, detour, dig, earthworks, employee, excavation, inform, jumpsuite, labourer, man, markings, panel, red, risk, road, road man, road mender, road signs, skid, studio, traffic, uniform, warn, white, worker, works, yellow, young,