Southern Railway (SR) has become the first zone to achieve 100 per cent installation of automatic block signalling (ABS) on the golden quadrilateral/ golden diagonal routes. This includes the 134 km long Chennai-Renigunta and 141 km long Chennai-Arakkonam corridors.
With this, 58 dual multi-section digital axle counter (MSDAC) detection points, 33 new track sections (up and down), 19 automatic signals, and five auto location huts (ALHs) have been installed for real-time monitoring. This section is now equipped to support future upgrades, including migration to Kavach, long-term evolution for railway (LTE-R), and centralised traffic control (CTC).