Indian Railways commissioned the Kavach 4.0 Automatic Train Protection system on 1,452 route kilometres of high-density corridors such as Delhi-Mumbai and Delhi-Howrah. The update, dated 13 March 2026, is important for both railway safety and indigenous technology. Kavach 4.0 is India's own signalling and train-safety technology, designed to assist the loco pilot and keep train operations within safe limits when a risky situation develops.
Kavach uses GPS, RFID tags, radio communication, trackside equipment, and onboard equipment. If the loco pilot misses the prescribed speed limit or signal requirement, the system gives support and applies brakes automatically when needed. This helps reduce risks linked to collision and Signal Passing at Danger, where a train crosses a stop signal. The improvements listed for Kavach 4.0 include higher location accuracy, better signal-aspect information in larger yards, station-to-station Kavach interface over optical fibre cable, and direct interface with existing electronic interlocking systems.
For exams, this topic connects science and technology with infrastructure, public safety, and governance. In prelims, likely facts include the nature of Kavach, its technical components, commissioning on 1,452 route kilometres, the Delhi-Mumbai and Delhi-Howrah corridors, and its status as an indigenous Automatic Train Protection system. In mains, it can be used as an example of railway modernisation, accident-risk reduction, and technology-led improvement in public services. Consequential train accidents were reported to have declined from 135 in 2014-15 to 14 in 2025-26 up to 28 February 2026, which is about a 90% reduction. That figure gives the broader safety context, while Kavach 4.0 shows the technological dimension of the same safety push.