Kolkata, Nov 22 (PTI) With the aim of upgrading its different systems for improvement of services, amenities and safety system, Metro Railway Kolkata will construct seven additional traction sub-stations along its Blue Line, the Dakshineswar-Sahid Khudiram (Birji) stretch.

A Metro spokesperson said Saturday that to improve train operations in Blue Line, which is a 41-year-old corridor and the country's oldest, seven additional traction substations will be constructed at Kalighat, Netaji Bhawan, Maidan, Esplanade, MG Road, Sovabazar-Sutanuti and in between Belgachia and Shyambazar stations.

With this, Blue Line shall have traction substations at each station like the Purple Line (Joka-Majerhat) and Orange Line (Kavi Subhas-Beleghata), he said.

"Apart from this, in order to meet the deman

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