Ключевые слова: blueprint, builder, cargo, concentration, crisscross, crossing, danger, daylight, development, engineer, equipment, focus, freight, hardhat, hazard, heavy, industry, infrastructure, inspect, intersecting, junction, labor, logistics, maintenance, metal, monitor, observe, outdoor, points, professional, progress, project, railroad, rails, railway, repair, safety, signals, skilled, steel, survey, switch, tools, tracks, train, transport, urban, vest, worksite,