Indian Railways Expands Kavach 4.0 Safety System

Indian Railways approved multiple projects on 15 June 2026 for the expansion of Kavach 4.0, the indigenous Automatic Train Protection system. The approved works include route-based deployment, locomotive installation, and communication upgrades under the railway safety programme.

Kavach 4.0 as an Automatic Train Protection System

Kavach is an indigenous Automatic Train Protection system developed for Indian Railways. It is designed to prevent Signal Passing at Danger, head-on collisions, rear-end collisions, and overspeeding through continuous monitoring and control functions.

Route Coverage and Sanctioned Projects

The Ministry of Railways sanctioned Kavach Version 4.0 on 598 Route km across 48 block sections of the Ahmedabad Division of Western Railway in Gujarat at a cost of ₹140 crore. This approval covered the remaining sections of the division after earlier sanctions for about 702 Route km in the same division. Indian Railways also approved Kavach implementation on 811 Route km in the Ambala Division of Northern Railway at a sanctioned cost of ₹201 crore. The Ambala Division project covers sections in Haryana, Punjab, and Himachal Pradesh.

Communication Backbone and Network Expansion

The Kavach expansion forms part of an umbrella programme for providing an LTE-based communication backbone on remaining railway routes. On 15 June 2026, projects worth over ₹1,200 crore were approved for communication infrastructure upgrades and Kavach expansion across multiple railway zones. These projects include the deployment of Kavach 4.0 on 548 kilometres of high-traffic routes across Tamil Nadu, Kerala, and Karnataka at a cost of over ₹300 crore.

Locomotive Installation and Earlier Approval

On 7 April 2026, Indian Railways approved ₹1,364 crore for faster rollout of the Kavach system. The April approval included deployment of Kavach Version 4.0 on 232 locomotives under a broader modernisation programme.

Important Facts for Exams

• Kavach is India’s indigenous Automatic Train Protection system used by Indian Railways.
• Signal Passing at Danger, or SPAD, is a railway safety term for a train passing a stop signal without authority.
• Route km, abbreviated as RKM, is a railway measurement used for sanctioned line length.
• Western Railway and Northern Railway are two of the 18 railway zones of Indian Railways.

Railway Safety Technology

Automatic Train Protection systems are used in rail transport to reduce human error in train operations. Kavach 4.0 is the latest version mentioned in the approved railway safety projects.