HBL Power: Signs of change

AP train crash: Full Kavach cover may take a decade | Mint (livemint.com)

• The official said the railways plans to float a ₹5,000 crore tender early next year for fast-tracking the adoption of Kavach. These include two tenders for Kavach, on a 6,000-km network each. This is double the 3,000 km first tender for Kavach issued in 2021.
• According to an earlier plan of the railways, top priority would be accorded to high-speed trains on busy routes in the New Delhi-Mumbai and New Delhi-Howrah sections.
• The second priority was to install Kavach on trains running on heavily used networks with automatic block signalling and centralized traffic control.
• In the third phase, Kavach would be introduced on other high-density routes with automatic block signalling.
• Officials said the priority order will now be fast-tracked for this anti-collision system, which works best for heavy-density routes where trains run at frequent intervals and the distance between two trains is often a lot less than on other routes.
• Other than Kavach, automatic block signalling will stop trains automatically if the driver fails to see a signal. Centralized control would add another level of manual or physical check on train operations supported by system checks.
• So far, around 1,445 km of network has been covered with Kavach. With new tenders, the initiative would be expanded quickly along entire railway network of around 70,000 km.

India’s ‘Kavach’ Protection For Trains: Could This Be The Formula To Run High-Speed Trains? – News18

Ericsson showcased the power of LTE and how it positively impacts the performance of the Kavach system and reduces the latency to ensure that trains can run at high speeds in a secure fashion. The interesting part about Kavach is that it can be integrated with both new and old-gen trains in the country as it is backward compatible, which saves Indian Railways a lot of money which would have been needed to upgrade the existing trains to equip the Kavach security system.

a short youtube video link embedded – Indian Railways Kavach System Explained: How This Anti-Collision Tech For Train Works – YouTube

a few points from the above video link:
right now working in UHF Ultra high frequency and if it moves to LTE.

• it takes 4 seconds to register a locomotive in UHF v/s 160 milliseconds in LTE
• it takes 2 seconds to communicate between Kavach and Station v/s 40-50 milliseconds in LTE

it helps to run trains at higher speeds when on LTE, especially like Vande Bharat trains.