As per a recent RTI reply, there are several causes of delays in passenger trains. Here are the key reasons identified: 1. Infrastructure Issues: Issues with railway tracks, such as track maintenance and repairs, signaling problems, or derailments, can lead to delays. 2. Congestion: Congestion on railway routes due to high train density or sharing tracks with freight trains can cause delays as trains have to wait for clearance. 3. Operational Issues: Operational challenges like loco failures, coach defects, or coupling problems can significantly delay trains. 4. Extreme Weather Conditions: Adverse weather conditions, such as heavy rainfall, fog, or cyclones, can impact train schedules and necessitate slower speeds, leading to delays. 5. Unavoidable Stops: Trains often have scheduled or unscheduled stops at various stations during their journey, which can result in delays if they are not managed efficiently. 6. Accidents or Incidents: Various incidents like accidents, protests, or track obstructions can disrupt train services and cause delays. It is important to note that these causes can vary in magnitude and frequency depending on the specific region and railway network.