MUMBAI (Metro Rail News): Indian Railways is working on the Kavach 5.0 version, which will be implemented on Mumbai’s Suburban Network (or the Mumbai Locals) with enhanced safety features and to allow more frequent train services. Kavach 5.0 will be an advanced system with improved safety standards and upgrades following the feedback of the previous versions. The system is also envisioned for India’s premium train, Vande Bharat 4.0.
The Kavach 5.0 version was announced in April, 2025. It will be an advanced signalling and safety system designed for the suburban regions. It will reduce the inter-train headway distance with its fast signalling system leading to an increase in the frequency of trains. Upon implementation, this will provide relief to the daily commuters of the Mumbai Locals.
Kavach is India’s indigenously developed Automatic Train Protection (ATP) system. It is an initiative to foster “Made in India” railway technology and reduce dependence on foreign imports. Further, it is made specially keeping in mind the challenges of the Indian terrain and environmental conditions.
Working Mechanism of Kavach
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Kavach has two components, trackside and on-board. These components operate through continuous real time communication using Ultra High Frequency (UHF) radio antenna and Radio Frequency Identification tags mounted on the tracks. The trackside ATP system contains the information regarding the permitted speed in a particular track and the gradients. The on board ATP system monitors the train speed and provides critical information to the loco pilot.
The main objective of the Kavach system is to assess the signals and launch automatic brakes in any of the cases such as if the train passes a Signal Passed At Danger (SPAD), if the loco pilot collapses, and if the train passes the permitted speed limit. Thus, the system prevents any potential collisions and accidents ensuring safe operations.
Evolution of Kavach
Initially, India was dependent on foreign imports for train protection technology. To reduce this dependence and have Indian condition-friendly options, the development of Kavach was initiated. The first field trials of the system began in 2016. In 2018-19, the Kavach 3.2 version was approved and the latest version, Kavach 4.0, was approved in July 2024. The upcoming version 5.0 is currently under development.
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