Indian Railways Expands Kavach 4.0 Safety System on High-Density Routes
Kavach 4.0 expanded on high-density routes; uses GPS, RFID for automatic collision prevention.
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Key Points for RAS
- Indian Railways expanded Kavach 4.0 automatic train protection system on high-density rail routes.
- Kavach uses GPS, RFID, and data communication technologies.
- The system automatically applies brakes to prevent collisions.
- Kavach is India's indigenous signalling technology for railway safety.
Indian Railways expanded the Kavach 4.0 automatic train protection system on high-density rail routes. Kavach uses GPS, RFID, and data communication to automatically apply brakes and prevent collisions, representing India's indigenous signalling technology for railway safety.
Frequently Asked Questions
1 What is Kavach 4.0 and on which railway corridors has it been commissioned?
Kavach 4.0 is Indian Railways' indigenous Automatic Train Protection (ATP) system commissioned on 1,452 route kilometres of the Delhi-Mumbai and Delhi-Howrah corridors. It uses RFID tags, on-board equipment, and radio towers to prevent Signal Passing at Danger (SPAD).
2 What are the key new features of Kavach 4.0 compared to earlier versions?
Kavach 4.0 features: enhanced location precision, Electronic Interlocking integration, optical fiber and UHF radio connectivity, automatic braking, and SOSR (SOS on Radio) emergency broadcast — covering 1,452 route km of key high-density corridors.
3 By how much has Kavach reduced consequential train accidents in India since 2014?
Consequential train accidents fell ~90% — from 135 in 2014-15 to 14 in 2025-26 (up to February 2026). Kavach 4.0 is deployed on 1,452 route km across Delhi-Mumbai and Delhi-Howrah corridors.
4 What is SOSR emergency broadcast in Kavach 4.0 railway safety system?
SOSR (SOS on Radio) is a new feature in Kavach 4.0 enabling real-time emergency broadcast across the train protection network. Kavach 4.0 covers 1,452 route km on Delhi-Mumbai and Delhi-Howrah corridors with ~90% reduction in accidents since 2014-15.
5 What is Signal Passing at Danger (SPAD) and how does Kavach 4.0 prevent it?
SPAD occurs when a train crosses a red signal, risking collisions. Kavach 4.0 prevents SPAD via RFID tags, on-board equipment, radio towers, and automatic braking, deployed on 1,452 route km of Delhi-Mumbai and Delhi-Howrah corridors.
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