What is Kavach, anti-collision system missing from Kanchanjunga Express route?

Kavach, which is a made-in-India system for trains specifically designed to prevent collisions, is not yet installed on the train tracks in Darjeeling, where the Kanchanjunga Express train accident happened.

The Indian rail network is over one lakh kilometers long, and the anti-collision system is only implemented on around 1,500 km stretch of railway tracks.

The anti-collision Kavach system is an automatic train protection (ATP) system, which was developed in India by the Research Design and Standards Organisation (RSCO) and other Indian firms. Its primary feature is controlling the speed of the train if the driver fails to apply brakes on time.