In a major step toward modernizing its services, Metro Railway Kolkata has commenced replacing the steel third rail on the Blue Line with a new, highly conductive aluminum rail. This significant upgrade, the first in 38 years, is set to dramatically enhance operational efficiency and reduce energy loss.

Major Infrastructure Overhaul

The replacement project aims to cut energy loss by 84%, which translates to savings of approximately Rs 1 crore per kilometer annually. Once completed, Kolkata Metro will join global metros like those in Singapore, London, Moscow, Berlin, Munich, and Istanbul, which have already implemented similar upgrades.

Work has begun at Girish Park and Maidan stations. The aluminum rail, manufactured in Germany and shipped from Hamburg, arrived at Kolkata Port in late July. The initial shipment covers about 5 kilometers, with a total of 35 kilometers planned for installation over the next two years. The next shipment is expected in October.

Preparatory work for the rail foundation, using premix concrete for the first time, has been completed at Girish Park and Maidan Y sidings. Installation is currently underway between Girish Park and Mahatma Gandhi Road stations.

Enhanced Performance and Environmental Benefits

The aluminum rail’s superior conductivity will reduce voltage drops, leading to faster acceleration and shorter travel times. This will allow for more frequent services and lower operational costs. Additionally, the upgrade will cut carbon emissions by 50,000 tons over its lifetime and will require less maintenance, improving air quality in the tunnels.

Kolkata Metro’s transition to aluminum rails represents a significant advancement in urban transportation, promising both efficiency and environmental benefits.