New Delhi, July 30: In a significant milestone for Indian Railways, the indigenous Automatic Train Protection (ATP) system Kavach 4.0 has been successfully commissioned on the Mathura-Kota section of the high-density Delhi-Mumbai corridor.
The deployment of this advanced safety system marks a crucial step in modernizing the nation’s railway infrastructure and enhancing passenger safety.
Unveiling the development, Railway Minister Ashwini Vaishnaw emphasized the system’s indigenous origins and its alignment with the Atmanirbhar Bharat vision of Prime Minister Narendra Modi. “Railways has indigenously designed, developed, and manufactured the Kavach system. While many developed nations took decades to develop such systems, India has commissioned Kavach 4.0 in record time. This is a major achievement,” he said.
Approved by the Research Designs and Standards Organisation (RDSO) in July 2024, Kavach 4.0 represents the most advanced iteration of the safety technology. It is designed to prevent train collisions, enforce speed limits, and ensure automatic braking in case of emergency situations—even in low-visibility conditions such as fog.
Indigenous Innovation Backed by National Vision
Developed with Safety Integrity Level 4 (SIL-4), the highest level of safety certification, the Kavach system began its journey in 2015. After undergoing rigorous testing and initial deployment in the South Central Railway zone, Indian Railways incorporated feedback to develop the upgraded Kavach 4.0, which was approved in May 2025 for speeds up to 160 kmph.
All key components of the system—including RFID tags, telecom towers, on-board equipment, and control systems—are being manufactured domestically, ensuring reduced reliance on imports and bolstering India’s self-reliance in high-end rail technologies.
How Kavach Works
Kavach is a highly complex safety mechanism, equivalent in scope to setting up a complete telecom infrastructure. Key components of the system include:
RFID Tags: Installed every 1 km and at each signal point to pinpoint the exact location of trains.
Telecom Towers: Erected along the track for real-time communication between trains and control centers.
Loco Kavach: Integrated into locomotives to relay and receive critical safety information, including automated braking.
Station Kavach: Installed at all stations and block sections, guiding train movement based on signalling and safety protocols.
Optical Fibre Network: Enables high-speed data transfer between all subsystems.
Integrated Signalling System: Ensures seamless coordination between on-ground and onboard systems.
These components work in tandem to monitor train speeds, enforce limits, and trigger automatic brakes to prevent collisions. In foggy conditions, loco pilots receive signal information directly on their dashboard, eliminating the need to rely on external visuals.
Scaling Up Across India
Indian Railways has ambitious plans to deploy Kavach across key routes nationwide within the next six years. So far, significant progress has been made:
| Sr. No. | Item | Progress |
| 1 | Optical fibre laid | 5,856 km |
| 2 | Telecom towers installed | 619 |
| 3 | Kavach installed at stations | 708 |
| 4 | Kavach installed on Locos | 1,107 |
| 5 | Trackside equipment installed | 4,001 Rkm |
Over 30,000 personnel have been trained on the Kavach system. Additionally, the Indian Railway Institute of Signal Engineering and Telecommunications (IRISET) has partnered with 17 AICTE-approved engineering institutions to introduce Kavach modules into their B.Tech curricula, ensuring a steady pipeline of trained engineers for future deployments.
A New Era in Rail Safety
Kavach 4.0 is one among several safety initiatives for which Indian Railways allocates over ₹1 lakh crore annually. Its commissioning on one of the busiest railway corridors in India is a testament to the Railways’ commitment to world-class safety standards.
With Kavach 4.0 now operational on the Mathura-Kota section, Indian Railways sets the stage for its rollout across the country, reinforcing safety, reliability, and technological excellence in Indian train operations.
