Project Profile: Chennai Metro Rail

The Chennai Metro is a multi-phase rapid transit system engineered to address urban mobility challenges in Chennai, India. The project integrates standard gauge track, advanced signaling, and a phased expansion strategy to create a high-capacity public transport network. This profile details the technical specifications and strategic objectives of the system, focusing on the operational Phase 1 and the extensive Phase 2 expansion.

Project Fact Sheet

Technical Specifications

The Chennai Metro operates on a 1,435 mm standard gauge, a strategic choice diverging from the regional broad gauge to align with international metro standards. The entire network utilizes a ballast-free slab track design to minimize maintenance requirements and enhance ride stability. Power is supplied via a 750V DC third-rail system, which is ideal for high-frequency urban operations. The extensive Phase 2 expansion features a significant proportion of underground alignments (approximately 55%), utilizing Tunnel Boring Machines (TBMs) to navigate the dense urban environment with minimal surface disruption.

Rolling stock for Phase 1 was supplied by Alstom, consisting of 42 four-car Metropolis trainsets. These trains are equipped with modern amenities including air conditioning, electrically operated automatic doors, and a regenerative braking system that recovers kinetic energy to improve power efficiency. Operations are managed through a centralized control center using an integrated Automated Train Protection (ATP) and Automatic Train Supervision (ATS) system. This ensures high levels of safety, precise train scheduling, and optimized headway between services.

Key Takeaways

• Strategic Expansion for Urban Growth: The project’s multi-phase execution, particularly the large-scale 118.9 km Phase 2, is a forward-looking strategy designed to accommodate Chennai’s future population growth and economic expansion.
• Technological Standardization: The adoption of standard gauge, third-rail power, and advanced CBTC-ready signaling systems like ATP/ATS creates a highly efficient, safe, and modern network that sets a benchmark for other metro projects in India.
• Integrated Multimodal Transport: The network’s corridors are strategically planned to integrate with existing transport hubs, including Chennai Central railway station and major bus terminals, fostering a seamless and comprehensive public transportation ecosystem.

Frequently Asked Questions (FAQ)

When will Chennai Metro Phase 2 be fully open?
The Chennai Metro Phase 2 expansion is being constructed in stages, with the entire 118.9 km network expected to become fully operational between 2026 and 2028. Specific sections and corridors will open progressively as they are completed and commissioned.

Who is building the Chennai Metro?
The Chennai Metro is owned and operated by Chennai Metro Rail Limited (CMRL), a joint venture between the Government of India and the Government of Tamil Nadu. Key project partners include Alstom for rolling stock, the Delhi Metro Rail Corporation (DMRC) as a consultant for Phase 1, and financing from international bodies like the Japan International Cooperation Agency (JICA).