From Steam to Speed: The Ever-Evolving Journey of Railways

• Indian Railways (IR) — departmental undertaking under the Ministry of Railways, the world's fourth-largest rail network and India's principal mass-transport backbone.
• Topic captures a 173-year arc from steam traction (1853) to indigenous high-speed (Vande Bharat), near-total electrification, and ATP system Kavach.
• Examinable across GS-III (infrastructure, economy), GS-I (modern history) and current affairs (Budget, schemes).