India Sanctions ₹895 Crore for Kolkata Metro and Adra Bridge to Boost Capacity and Safety

Key facts

• Total sanctioned amount: ₹895.30 crore
• Kolkata Metro upgrade: ₹671.72 crore for 7 new traction substations and 33 KV system
• Current metro frequency: 5 minutes; target after upgrade: 2.5 minutes
• Adra bridge project: ₹223.58 crore for Bridge No. 520 UP (built 1965) and DN (built 1903)
• Bridge carries 67 GMT traffic on key coal and DFC feeder route
• Project covers Esplanade to Kavi Subhash corridor and elevated sections Netaji to Kavi Subhash

Aging Infrastructure Gets Major Funding Injection

Indian Railways has approved infrastructure and capacity enhancement projects worth ₹895.30 crore, targeting the Kolkata Metro’s North–South Corridor and a critical bridge in the Adra division of South Eastern Railway. The twin investments aim to address decades-old equipment limitations and structural distress that have constrained passenger capacity and freight movement. The largest share, ₹671.72 crore, will modernize the Kolkata Metro’s power systems, while ₹223.58 crore is earmarked for reconstructing the foundation and substructure of Bridge No. 520 over the Damodar River. Both projects are expected to significantly improve operational efficiency and safety.

Kolkata Metro: From 5-Minute to 2.5-Minute Headways

The Kolkata Metro, originally built in the 1980s, was designed for train frequencies of about five minutes. Rising passenger demand has outpaced that capacity, and existing substations are reaching their limits, with spare parts becoming increasingly difficult to source. The sanctioned upgrade includes seven new traction substations costing ₹291.06 crore and a power system augmentation from 11 KV to 33 KV along the Esplanade–Kavi Subhash corridor, plus elevated sections from Netaji to Kavi Subhash, at a cost of ₹380.66 crore. Once completed, the metro will be able to operate at 2.5-minute headways, effectively doubling line capacity and improving service reliability.

Adra Bridge: Replacing a 120-Year-Old Structure

Bridge No. 520, consisting of an UP line built in 1965 and a DN line dating back to 1903, spans the Damodar River between Madhukunda and Damodar stations. It has shown signs of structural distress, necessitating reconstruction of its foundation and substructure. The section is a vital rail link between Asansol and Tatanagar, serving as a key Dedicated Freight Corridor feeder route and coal corridor (Sini–Purulia–Asansol). It carries a high traffic density of 67 million gross tonnes (GMT) annually. The ₹223.58 crore project includes yard remodelling and track works on bridge approaches, aimed at enhancing safety, reliability, and operational efficiency.

Strategic Importance for Freight and Passenger Networks

The Adra bridge project reinforces Indian Railways’ focus on strengthening freight corridors, particularly for coal transport, which is critical for power generation and industrial supply chains. The Kolkata Metro upgrade, meanwhile, addresses urban commuter congestion in one of India’s oldest and busiest metro systems. Together, the two projects represent a coordinated push to modernize both passenger and freight infrastructure, tackling bottlenecks that have long hampered capacity. The approvals come as Indian Railways continues to prioritize safety upgrades and capacity expansion across its network.

Timeline and Next Steps

Both projects have been formally sanctioned, but specific completion dates have not been disclosed. The Kolkata Metro upgrade will require phasing to minimize disruption to existing services, while the Adra bridge reconstruction may involve temporary traffic diversions. Railway officials have indicated that detailed project reports and tendering processes will follow shortly. The investments are part of a broader capital expenditure plan aimed at modernizing India’s railway infrastructure, with a focus on high-density corridors and ageing assets.

The bottom line

• Indian Railways has approved ₹895.30 crore for two major projects: Kolkata Metro power upgrade and Adra bridge reconstruction.
• Kolkata Metro will increase train frequency from 5 to 2.5 minutes, doubling line capacity.
• The Adra bridge, with sections dating to 1903 and 1965, will get a new substructure to handle 67 GMT traffic.
• Both projects address critical safety and capacity issues in high-demand corridors.
• The investments signal a continued focus on modernizing ageing railway infrastructure in India.