Anti Collision Devices (ACD) has been provided as a pilot project covering 1736 Route Kilometers and 548 Locomotives on Northeast Frontier Railway (NFR). Based on the experience of the NFR, the specifications and design configuration were revised and the system as evolved was tried on the electrified multiple lines automatic signaling section of the Southern Railway in 2010-11. Operational and technical problems noticed in Southern Railway trials are being looked into and a new ACD Version-II after successful validation and certification will undergo extensive conformity trials once again before implementation.

ACD works have been sanctioned on 5160 Route Kms. on Eastern, South Eastern, East Central and East Coast Railways during last three years and will be taken up for implementation with new ACD Version-II.

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