Ключевые слова: accident, activities, area, assemble, assembly, aware, background, building, caution, crisis, danger, direction, door, emergency, escape, evacuation, exit, gather, green, group, head count, icon, illustration, incident, industry, inform, information, interior, light, location, meet, people, point, project, protection, rendezvous, safe, safety, salaries, security, sign, signage, signboard, site, symbol, time, together, wall, warning, work,