The Delhi Metro Rail Corporation (DMRC) has initiated a comprehensive mid-life refurbishment programme for its oldest trains, that of the Blue Line, aiming to bolster passenger safety and comfort, according to a statement on Sunday.

This retrofit initiative targets the earliest rolling stock (RS-1) trains, many of which were inducted between 2002 and 2007 and have now completed nearly 20 years of service.
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According to the DMRC, the corporation is refurbishing a total of 70 trains across the Red and Blue lines in a phased manner to align them with modern technological standards. The first phase saw the upgrade of 12 trains, followed by 18 trains in the second phase.
Work on the third phase is currently underway, with the DMRC stating that 22 Blue Line trains are scheduled for refurbishment by November 2027.
DMRC Managing Director Vikas Kumar recently inspected the first train completed under the third phase before it was reintroduced into passenger service.
The DMRC highlighted that this brings the total number of refurbished trains to 31 so far.
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What are new features?
According to the DMRC, the aesthetic upgrades include repainting passenger sections and driver cabins to fix years of wear and tear. Electrical panels have also been upgraded to improve reliability.
Technical enhancements are a significant part of the programme, with the DMRC confirming the installation of state-of-the-art IP-based Passenger Announcement and Passenger Information Systems (PA-PIS).
These systems, along with new CCTV cameras and LCD-based Dynamic Route Maps (DRM), will provide commuters with real-time updates on station arrivals and routes.
Furthermore, the DMRC stated that these systems enable vital communication between passengers and operators during emergencies.
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Safety measures have been a primary focus, with authorities overseeing the installation of new fire detection systems equipped with smoke and heat sensors in all coaches.
Ease of charging phones
According to the DMRC, older relays and Miniature Circuit Breakers (MCBs) have been replaced with advanced units to ensure smoother operations.
To meet modern commuter needs, the DMRC noted that all refurbished coaches are being fitted with mobile and laptop charging points.
New jumper cables and connectors have also been installed to support these upgraded systems and accommodate future technological requirements.

