OREANDA-NEWS. August 09, 2011. Automatic Signalling System has been found useful for increasing trains services in the existing lines, especially in suburban section around metro cities where traffic is generally segregated and headway between trains is less due to high density of traffic. However, its usefulness is limited in sections where there is mixed traffic with differential speeds, reported the press-centre of Indian Railways.

Automatic Block Signalling permits more than one train in a block section thereby improving the line capacity as well as the throughput. Space interval between trains is secured by continuous train detection devices provided for automatic signals.

As present 2147 route kilometres have been provided with automatic signaling systems. The cost of implementing automatic signaling system is approx. Rs. 50 lakh per route kilometer for double line sections.