Archive · 25 Sep 2026
Kavach 4.0 Upgrade Strengthens India’s Railway Safety
Kavach is a safety system made for Indian trains.
It helps trains avoid crashing into each other.
If a train passes a red signal or travels too fast, the system can apply the brakes automatically.
It also tells the driver about signals and how far the train may safely travel.
The new Kavach 4.0 can find a train’s location more accurately.
It can also connect stations and work with existing railway signalling equipment.
Other countries use systems such as ETCS in Europe, ATC in Japan and PTC in the United States.
These systems use technology to make train journeys safer.
Kavach Version 4.0 was commissioned on September 23 over 108 route kilometres of the Malkajgiri–Kamareddi section.
The Automatic Train Protection system can apply brakes automatically to prevent collisions, overspeeding and Signal Passing at Danger.
Version 4.0 improves train-location accuracy, signal identification, station connectivity and integration with electronic interlocking systems.
Kavach Version 3.2 had already been deployed across 1,465 route kilometres on the South Central Railway.
Comparable systems include Europe’s ETCS, Japan’s ATC and the United States’ Positive Train Control framework.
- Who
- Indian Railways, in collaboration with the Research Design and Standards Organisation and Indian industry, developed and deployed Kavach.
- What
- Kavach Version 4.0, an Automatic Train Protection system, was commissioned and upgraded railway safety functions.
- When
- The commissioning was reported on September 23; Kavach Version 4.0 was deployed after experience with Version 3.2.
- Where
- The upgrade covered 108 route kilometres on the Malkajgiri–Kamareddi section of the Hyderabad Division on the South Central Railway.
- Why
- The system is intended to prevent collisions, control overspeeding, support drivers and improve safe, reliable train operations.
- System
- Kavach is India’s Automatic Train Protection system, also known as the Train Collision Avoidance System.
- Commissioning coverage
- Kavach Version 4.0 was commissioned over 108 route kilometres.
- Earlier deployment
- Kavach Version 3.2 had been deployed over 1,465 route kilometres on the South Central Railway.
- Safety standard
- Kavach complies with SIL-4, described in the article as the highest level of safety integrity globally.
- Key protections
- The system addresses Signal Passing at Danger, head-on and rear-end collision risks, overspeeding and low-visibility conditions.
- Version 4.0 improvements
- Improvements include more accurate positioning, better signal identification, optical-fibre connectivity and direct electronic-interlocking interfaces.
- International comparisons
- Europe uses ETCS, Japan uses ATC and the United States uses Positive Train Control implementations.