Indian Railways has successfully commissioned the indigenously developed Automatic Train Protection (ATP) system Kavach 4.0 on 738 route kilometres. This commissioning work has been completed on Palwal-Mathura-Nagda section (633 route km) and Howrah-Burdwan section (105 route km) on Delhi-Mumbai route and Delhi-Howrah route.
Railway Minister Ashwini Vaishnav said in a written reply in the Rajya Sabha on Friday (December 5, 2025) that the trackside work of Kavach has so far been taken up on 15,512 route km, covering the Golden Quadrilateral, Golden Diagonal, High-Density Network and other important railway routes.
What are the features of Kavach 4.0?,
In fact, the Kavach system ensures that the speed limit of the train is followed and automatically applies the brakes even if the brakes are not applied by the loco pilot. It helps in safe operation even in bad weather, but now some special improvements have also been included in the new and updated version Kavach 4.0. It includes high location accuracy, signal information developed in large yards, OFC based station-to-station interface, direct integration with electronic interlocking systems.
It is noteworthy that the first field trial of Kavach started in February 2016. After independent security assessment in the year 2018–19, three companies got approval to supply Kavach version 3.2. It was adopted as the national ATP system in July 2020 and RDSO approved Kavach version 4.0 on July 16, 2024, building on experiences from the deployment of version 3.2 in 1,465 route km on South Central Railway.
Kavach 4.0 deployment continues in Delhi-Mumbai and Delhi-Howrah corridors
Now the deployment of armor system is going on on a large scale in the railway network across the country. The deployment of Kavach 4.0 is also continuing in the remaining parts of Delhi-Mumbai and Delhi-Howrah corridor. Also, tenders have been issued to install armor equipment on 9,069 additional locomotives.
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