Southern Railway becomes the first zone in Indian Railways to complete 100% Automatic Block Signalling work on Golden Quadrilateral/Golden Diagonal (GQ/GD) routes which covers 275 Kms in the zone including Chennai – Renigunta (134 km) and Chennai – Arakkonam (141 Kms).
As of 15th June 2025, Automatic Block Signalling (ABS) has been successfully commissioned in the Puttur – Pudi section under Chennai Division covering over 33 km (18.73 km UP & 14.36 km DN lines) along with provision of Electronic Interlocking System at Tadaku station with RDSO standard circuits. With this, automatic signalling is now commissioned from Chennai to Renigunta, enabling seamless and more efficient train operations all the way up to Tirupati. The first trains to be operated on the newly signalled section were Train No. 17652 Kacheguda – Chengalpattu Express (UP direction) from Pudi and BCN Goods train (DN direction) from Puttur on 15.06.2025.
Key Features of the Work:
- 19 Automatic Signals (11 UP, 8 DN) and 58 Dual MSDAC Detection Points for reliable train detection.
- 19 UP and 14 DN Track sections to enhance line capacity and train handling.
- 5 Auto Location Huts (ALHs) installed between Puttur and Pudi for Automatic Block Signalling control and monitoring.
- Electronic Interlocking upgraded at Tadaku station, and modified at Puttur, Pudi & Sri Venkata Perumal Rajupuram.
- Advanced communication systems including 48-fiber Optic Fibre Cables (OFC) laid across the section.
- Manual LC Gate at Tadaku (LC 65) replaced with Electric Operation for better safety.
·Stations Covered: Puttur, Taduku, Pudi, Sri Venkata Perumal Rajupuram.
LC Gates Improved: LC 56, LC 65, LC 67 & ABS Huts Installed: ALH 11–15
This vital project includes modern safety systems like:
- Fire alarms, data loggers, power backups (10 kVA), VoIP/CCTV readiness, and modern power arrangements.
- Fully equipped Auto Location Huts (ALHs) with VRLA battery support ensuring uninterrupted operations.
The above work was executed by Railways in association with Rail Vikas Nigam Ltd (RVNL). With this, the section Chennai – Renigunta section of Southern Railway is future-ready for migration to advanced rail safety systems like KAVACH, Centralised Traffic Control (CTC), Long Term Evolution – Railways (LTE-R) and other modern signalling technologies. This commissioning not only boosts line capacity but also reduces train delays and enhances overall safety for both passenger and goods trains.
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