5 Key Takeaways
- Delhi Metro is conducting a feasibility study for a 16.5 km double-decker corridor combining a metro line above a flyover from Keshav Puram to Rohini Sector 34.
- The double-decker design aims to save land and reduce construction disruption by stacking transport infrastructure vertically in a densely packed urban area.
- The feasibility study will cover alignment, structural engineering, traffic modeling, utility shifting, environmental impact, and cost-benefit analysis over six months.
- If approved, the corridor could dramatically shorten travel times for residents in northwest Delhi and serve as a template for other Indian cities facing similar land constraints.
- Potential hurdles include navigating heavily developed areas, complex underground utilities, and ensuring the metro ridership justifies the investment.
Delhi Eyes Its Next Engineering Marvel: A Double-Decker Metro-and-Flyover Corridor from Keshav Puram to Rohini
A 16.5-kilometre stacked transport spine could reshape northwest Delhi's mobility landscape — if the feasibility study, set to run over six months at a cost of Rs 2.08 crore, gives the green light.
Delhi's streets are about to get a futuristic upgrade. The Delhi Metro Rail Corporation (DMRC) is preparing to launch a detailed feasibility study for a project that would stack a metro line above a flyover, creating a 16.5-kilometre double-decker transport spine between Keshav Puram and Rohini Sector 34. If the numbers and engineering align, this single structure could carry hundreds of thousands of commuters every day — on two levels, through one of the capital's densest urban corridors, without swallowing any extra land.
This is not just an incremental metro extension. It is a deliberate attempt to rethink how a crowded city builds for mobility. The study itself, pegged at an estimated Rs 2.08 crore and expected to take six months, will leave no stone unturned. Traffic behaviour, utility lines, structural loads, cost-benefit equations, and environmental ripples will all be mapped before a single pillar is designed. Here's why that matters, and what Delhi stands to gain — or lose — from the twin-deck gamble.
Why a double-decker, and why here?
Northwest Delhi's Keshav Puram–Rohini belt is a textbook case of urban pressure. Narrow rights-of-way, ceaseless vehicular movement, and tightly packed residential and commercial blocks leave little room for traditional, side-by-side transport solutions. A typical elevated metro requires a dedicated viaduct, and a flyover demands its own footprint. Building both separately would mean acquiring land, relocating utilities, and enduring years of compounded construction chaos. Stacking them one above the other — metro on the upper deck, road on the lower — flips the script.
The idea is firmly rooted in Delhi Metro's Phase-5B blueprint. While Phase IV corridors are still taking shape across the city, planners are already looking to Phase-5 to fill the last major gaps in the network. The Keshav Puram–Rohini stretch would thread together neighbourhoods that have long depended on erratic bus services and choked arterial roads. By bundling rail and road into a single elevated structure, DMRC aims to deliver a twin benefit: fast, reliable metro connectivity and a free-flowing road corridor for private vehicles, buses, and two-wheelers, all within the same airspace.
What the feasibility study will actually examine
When DMRC says "feasibility study," it means a multidisciplinary investigation that goes far beyond a drawing-board sketch. The chosen consultant will be expected to dissect the corridor from at least half a dozen angles.
First, alignment options. The study will weigh multiple paths between Keshav Puram and Rohini Sector 34, factoring in existing metro infrastructure, flyovers, underpasses, and the labyrinth of underground utilities — sewers, water mains, power cables, gas lines, and telecom fibre — that crisscross the area. Land availability will be scoped minutely. Even small parcels of government or private land can make or break a linear project like this.
Then comes structural feasibility. Indian cities have experimented with double-decker viaducts before — Nagpur Metro's Sitabuldi interchange, for example, stacks two metro lines, while parts of the Delhi-Meerut Regional Rapid Transit System (RRTS) run on multi-level structures. A metro-plus-flyover combination, however, creates different engineering demands. The consultant must verify that a single pillar can safely bear the weight of a fully loaded metro train on top and stop-and-go traffic below, while resisting wind, seismic forces, and decades of vibration.
Traffic demand modelling is equally critical. Teams will fan out to conduct traffic volume counts, turning movement counts, and origin-destination surveys. They will count how many cars, buses, auto-rickshaws, and pedestrians move through key junctions across different hours of the day and week. Speed and delay studies will capture how long vehicles idle at red lights, and public transport surveys will reveal where commuters are coming from, where they are going, and whether they would switch to a metro if it appeared overhead. All this data feeds into a digital transport model that simulates current traffic loads and projects them 10, 20, and 30 years into the future. That model, in turn, shapes the size of the flyover, the number of lanes, and the metro station designs.
Construction method assessments are another piece of the puzzle. The study will recommend whether the viaduct should be built using pre-cast segmental launching, cast-in-place techniques, or a hybrid approach, and which method would cause the least disruption to neighbourhoods below. Narrow roads and dense markets — characteristic of parts of Keshav Puram and Rohini — leave no margin for error. The consultant will also identify "utility shifting requirements," the delicate process of relocating pipes and cables without cutting off essential services for days on end.
Commercial viability will be scrutinised with equal rigour. A concept-level structural assessment and preliminary land requirement estimates will feed into indicative project cost projections, conceptual bills of quantities, and a cost-benefit analysis. The consultant will compare different structural options — say, a continuous double-deck viaduct versus an arrangement that merges and splits the two decks at select points — and assess whether the long-term savings in travel time, vehicle operating costs, and accidents justify the upfront investment.
The road beneath the tracks
A double-decker corridor is only as good as its interchanges. The study will intensively map the supporting road infrastructure that must come with it. Entry and exit ramps will determine how traffic smoothly ascends from ground level onto the elevated road deck. Loops, cloverleaf interchanges — those elegant, four-leaf-shaped junctions that let vehicles turn without ever stopping for a signal — and directional ramps will be proposed at critical intersections. The goal is to avoid creating a flyover that simply shunts congestion a few hundred metres down the road; every access point must be designed to weave traffic in and out without creating new bottlenecks.
Pedestrian movement will also get attention. Junctions along the corridor see heavy footfall from markets, residential colonies, and industrial pockets. Unless walkways, staircases, lifts, and pedestrian crossings are integrated into the design from day one, the double-decker could sever neighbourhoods instead of connecting them. The study will note these "traffic management structures" and propose how to serve all road users, not just motorists.
Environmental and financial checkpoints
Sensitive to the growing scrutiny around large infrastructure projects, DMRC's study mandate includes an environmental impact assessment. This will gauge potential effects on air quality, noise levels, and local ecosystems, and recommend mitigation measures — sound barriers, dust suppression during construction, tree transplantation instead of felling, and strict vibration limits near residential buildings. The environmental appraisal will be a pivotal factor in whether the project gets the green light from regulatory bodies.
On the financial side, the consultant will prepare a detailed cost estimate, broken down into civil works, systems, signalling, rolling stock, and contingency provisions. A comparative statement of different structural options — each with its own price tag, construction timeline, and land requirement — will help DMRC and the Delhi government pick the most prudent path. The final report will deliver a clear verdict: is the double-decker concept technically sound and commercially sensible, or would a standalone metro, a standalone flyover, or an entirely different alignment serve the region better?
Putting the 16.5 km route in context
To understand the corridor's significance, one has to look at the map. Keshav Puram is a dense residential and light industrial hub on the western side of the Delhi Metro's existing Red Line corridor. Rohini, a sprawling sub-city planned in sectors, stretches far to the northwest. Currently, the metro network touches Rohini Sector 18 via the Red Line and parts of Rohini Sector 7 via the Magenta Line, but large swathes — especially the rapidly growing sectors from 22 to 34 — remain beyond easy walking distance from a station. Buses and shared autorickshaws fill the gap, but road congestion is worsening as the population rises and vehicle ownership climbs.
A new metro corridor, elevated above a road flyover, would dramatically shorten travel times to employment zones in Netaji Subhash Place, Pitampura, and central Delhi. Because the double-decker design compresses two transport arteries into the same footprint, it avoids the protracted land-acquisition battles that have delayed countless urban projects. The study will confirm whether that theoretical advantage holds true on the ground between Keshav Puram and Rohini Sector 34.
A six-month clock and what it tells us
That the study is budgeted at Rs 2.08 crore and slated to be completed within six months signals serious intent. A feasibility study of this scope — encompassing traffic surveys, transport modelling, structural engineering, environmental analysis, and commercial appraisal — would typically take many months just to mobilise. A tight half-year deadline suggests DMRC wants actionable data quickly, possibly to align with Delhi's budget cycle and the Centre's push for next-generation urban infrastructure.
Notably, the project arrives at a time when Delhi is already warming to double-decker infrastructure. The city's first double-decker flyover with a metro corridor — a separate initiative spanning a different alignment — has been flagged off by the government. A December 2026 target has been set for its completion, Chief Minister Rekha Gupta has said. The Keshav Puram–Rohini study, therefore, builds on an emerging administrative appetite for stacking transport layers rather than spreading them horizontally.
Potential hurdles the study must navigate
While the concept is compelling, the feasibility study will have to grapple with real-world hurdles. The corridor passes through "busy and heavily developed areas," DMRC's brief acknowledges. Existing flyovers, metro viaducts, and complex underground utility networks don't just increase construction difficulty; they could force engineers to deviate from the ideal alignment, raise the height of the viaduct, or sink foundations deeper — all of which drive up costs. Land availability even for staircase towers, electrical substations, and ventilation shafts can become a deal-breaker in neighbourhoods where every square foot is contested.
The traffic surveys will need to be exceptionally granular because north-west Delhi's travel patterns are anything but uniform. Peak-hour flows mix office-goers, schoolchildren, goods vehicles, and visitors to hospitals and district centres. If the origin-destination surveys reveal that most trips are local and short, a double-decker might not capture enough metro ridership to justify the infrastructure investment. On the other hand, if the modelling predicts high passenger numbers and a sharp reduction in road congestion, the business case strengthens.
What happens next
Once the consultant submits the final feasibility report, DMRC will present the findings to its board and, subsequently, to the Delhi government and the Ministry of Housing and Urban Affairs. Approval would trigger the detailed project report (DPR) stage, where technical specifications, exact station locations, and financing arrangements are firmed up. That is the point at which timelines and budgets start to solidify.
If the Keshav Puram–Rohini double-decker gets the go-ahead, it will become a template for other choked stretches of the capital — and potentially for other Indian cities. Mumbai, Bengaluru, and Chennai are all exploring elevated road-cum-metro concepts, often as a way to circumvent the near-impossible task of acquiring land in central areas. A successful Delhi pilot would provide a playbook of design standards, traffic integration methods, and cost benchmarks for the rest of the country.
For the commuter, the message is equally significant. Six months from now, Delhi will know whether a 16.5-kilometre, two-level corridor can cut travel times, tame the daily traffic crawl, and reshape the way the city grows. Until then, the traffic count machines and the survey teams will do their quiet work at the intersections of Keshav Puram and Rohini, measuring the pulse of a city that never stops moving.
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