SCR debuts Kavach 4.0 on 108-km Hyderabad section in a first for the zone

South Central Railway (SCR) has upgraded Kavach, the indigenous train collision avoidance system, from Version 3.2 to Version 4.0 on the Malkajgiri–Kamareddy section of the Hyderabad Division, covering 108 route kilometres. It is the first deployment of Version 4.0 anywhere on the zone, SCR General Manager Sanjay Kumar Srivastava said on Tuesday.

Mr. Srivastava inspected the upgraded section along with senior railway officials and reviewed the works carried out on the stretch. The inspection covered the signalling and telecommunication arrangements that support the newer version of the system.

What Kavach does

Kavach is designed to provide an additional safety layer in train operations by reducing risks linked to human error. It is intended to prevent signal passing at danger (SPAD), over-speeding and collisions, and to support safer movement of trains during adverse weather conditions when visibility is poor.

The system works alongside existing signalling infrastructure. Equipment fitted on locomotives and along the track communicates continuously, and the system can intervene to apply brakes if the train crew does not act in time — a safeguard that operates independently of the driver's judgement.

Kavach has been developed within the country by the Research Designs and Standards Organisation (RDSO), the research arm of Indian Railways, and is among the indigenous technologies the national carrier is deploying across its network.

What Version 4.0 changes

SCR had earlier deployed Version 3.2 across 1,465 route kilometres. The newer version incorporates several technical changes. These include improved location accuracy, enhanced transmission of signal aspect information in large railway yards, station-to-station Kavach communication through Optical Fibre Cable (OFC), and direct integration with existing electronic interlocking systems.

Together, these features are meant to make the system more precise about where a train is and more reliable in passing on signal information — particularly in large, complex yards where multiple lines converge and the scope for error is higher.

Station redevelopment reviewed

Later in the day, Mr. Srivastava inspected the Kamareddy, Medchal and Malkajgiri railway stations and reviewed redevelopment works being carried out under the Amrit Bharat Station Scheme. He also examined passenger amenities and the facilities available in the circulating areas of the stations, which handle crowd movement at entry and exit points.

Principal Chief Signal and Telecommunication Engineer P.V. Murali Krishna and Hyderabad Divisional Railway Manager Santosh Kumar Verma, among other senior officials, were present during the inspection, according to an SCR press release.

The upgrade adds to the zone's existing Kavach coverage and reflects the broader, phased rollout of the anti-collision system on Indian Railways. Deployment of such systems is a continuing process, carried out section by section, as signalling and communication infrastructure is readied for each stretch.