Introduction
The Delhi Metro Rail Corporation is building India's first metro corridor specifically designed for three-coach train operations, running between Lajpat Nagar and Saket G Block. The 8-kilometre stretch, part of the Delhi Metro's Phase IV expansion, will feature eight stations and represents a departure from the four, six and eight-coach configurations used across the rest of the network.
Why Three Coaches
DMRC has said the decision was based on a realistic assessment of expected passenger flow along this particular route. While high-density corridors require longer trains to handle peak volumes, the Lajpat Nagar-Saket stretch primarily serves short-distance travellers who benefit more from frequent, efficient service than from high per-train capacity. Station platforms on the corridor have been designed at 74 metres, optimised specifically for three-coach operations rather than the longer platforms used elsewhere on the network.
Corridor Specifications
- Length: 8 kilometres, making it the second-smallest corridor in the Delhi Metro network.
- Stations: Eight, running from Lajpat Nagar to Saket G Block.
- Platform length: 74 metres, designed for three-coach trains.
- Configuration: Entirely elevated.
- Expected completion: 2028.
Capacity and Cost Considerations
Each coach on the new corridor is designed to accommodate roughly 300 passengers in seating and standing capacity combined. DMRC has described the smaller train configuration as a cost-effective and agile solution that maintains better frequency and operational efficiency while still serving a meaningful number of daily commuters. The corridor is projected to serve substantial daily ridership once operational, with the three-coach system intended to ensure economic sustainability without compromising service standards.
Table: Corridor at a Glance
| Detail | Information |
|---|---|
| Route | Lajpat Nagar to Saket G Block |
| Length | 8 km |
| Number of Stations | 8 |
| Train Configuration | 3 coaches (India's first such corridor) |
| Platform Length | 74 metres |
| Phase | Delhi Metro Phase IV |
| Expected Completion | 2028 |
Connectivity Goals
The corridor is designed to improve last-mile connectivity and provide seamless interchange with existing Delhi Metro lines, connecting several busy residential, commercial and institutional areas across south Delhi. Prime Minister Narendra Modi laid the foundation stone for the project in March 2024, and construction work on the elevated corridor is now underway.
What This Means for Commuters
For daily commuters along the route, the practical benefit of the three-coach design is expected to be higher service frequency, since shorter trains can be operated more often at lower operating cost per trip compared with running longer, partially empty trains on a route that does not generate high-density peak demand. This approach reflects a broader shift in metro planning toward matching train configuration to actual corridor demand rather than applying a uniform standard across an entire network.
Expert Insight
Urban transit planners note that right-sizing train configurations to corridor demand is standard practice in mature metro networks internationally, but represents a relatively new approach for Indian metro systems, which have historically standardised around larger configurations. If the Lajpat Nagar-Saket corridor performs well operationally, it could establish a template for future short-distance metro corridors in Delhi and other Indian cities where full-length trains would be economically inefficient.
Key Takeaways
- The Lajpat Nagar-Saket G Block corridor will be India's first designed for three-coach trains.
- The 8-km elevated line will have eight stations and 74-metre platforms.
- Construction is underway with completion expected by 2028.
- The design aims for higher frequency and lower operating cost on a short-distance route.
FAQ
How many stations will the new corridor have?
The Lajpat Nagar-Saket G Block corridor will have eight stations across its 8-kilometre elevated route.
Why are three-coach trains being used?
DMRC says the route primarily serves short-distance travellers, making frequent service with smaller trains more cost-effective than running longer trains with lower occupancy.
When will the corridor open?
The corridor is expected to be completed by 2028, with construction currently underway.
Conclusion
The Lajpat Nagar-Saket G Block corridor represents a meaningful experiment in demand-matched metro planning for India. If it delivers the promised combination of higher frequency and lower operating cost, the three-coach model could well be replicated across other short-distance urban corridors in the years ahead.
