Cat Linh–Ha Dong Metro is a 13.05 km elevated urban railway with 12 stations, linking Cat Linh with Yen Nghia and providing Hanoi with its first commercial metro operating experience.
Overview
Understand the asset as a connected system of infrastructure, operations and access.
Commercial service began in November 2021. The line is now best understood as operating public-transport infrastructure rather than a construction project. Its next strategic role is network integration: Hanoi upgraded automatic fare control in 2025 with chip-ID, bank-card, NFC, QR and biometric functions, creating a technical base for common ticketing across an expanding metro system. Fares, timetables, ridership and temporary service conditions should remain dynamic rather than frozen into the canonical profile.
Key things to understand
Treat Cat Linh–Ha Dong as operating infrastructure, not an unfinished project.
Keep current fares, timetables and ridership in a refreshable layer.
The line has 13.05 km, 12 elevated stations and one depot.
The 2025 automatic fare-control upgrade supports multiple cashless and identity technologies.
Its value grows as Hanoi adds transfer lines and common ticketing.
Do not confuse historical project investment with current operating cost or subsidy.
System perspective
How to understand this infrastructure system
Why it matters
It established commercial metro operation in Hanoi and provides a reliable high-capacity alternative along a heavily traveled southwest corridor.
What makes it distinctive
It is Hanoi's first commercially operating urban railway and therefore a practical foundation for operations, maintenance and fare-system integration.
What users often miss
The most important current questions are service integration and station access, not construction progress.
A 13.05 km elevated metro from Cat Linh to Yen Nghia that has carried passengers since 2021.
System identity
What this infrastructure connects and enables
Core role
Core Function
High-capacity urban rail between Cat Linh and Yen Nghia serving the southwest radial corridor.
Network Role
Operational Line 2A within Hanoi's expanding metro network.
Economic Role
Provides reliable mass transit, reduces road dependence and establishes operating experience for future metro integration.
Core Insight
This is an operating transit line; its value increasingly depends on network integration, feeder access, common ticketing and transfers rather than construction status.
Network structure
Length
13.05 km.
Stations
12 elevated stations.
Depot
One depot.
Alignment
Entirely elevated in the original project configuration.
Termini
Cat Linh and Yen Nghia.
Integration
Common fare-control technology is being integrated with Hanoi's other operating metro line.
Development
How the infrastructure developed over time
01
2009–2018
Approval and construction
Project approval, financing adjustment, civil works and systems installation.
02
2018–2021
Testing and acceptance
Extended testing, safety assessment and handover preparation.
03
From 6 November 2021
Commercial operation
Passenger service begins under Hanoi Metro.
04
2025–2026
Digital fare integration
Biometric and cashless automatic fare-control upgrades establish a common technical standard for the expanding network.
Status guide
How to read operating status
Operational, technically open, under construction, expansion and planned are different states.
OperationalIn normal public operation.
Technically openTraffic or technical operation has begun while finishing or system works may continue.
Under constructionPhysical construction is active.
Approved / implementation preparationApproved or assigned for implementation but not yet a normally operating asset.
PlannedIncluded in an approved or strategic plan but not yet under construction.
Network anatomy
How the system changes across segments or regions
01
Cat Linh–Lang corridor
Connects dense central-west urban districts to the metro.
Watch for
Transfer quality and street access.
02
Thanh Xuan corridor
Serves major residential, education and employment areas.
Watch for
Bus/metro integration and station access across large roads.
03
Ha Dong–Yen Nghia
Extends mass transit deep into western/southwestern Hanoi.
Watch for
Last-mile connections and park/bus interchange demand.
Design & operations
How design choices shape operation and capacity
Form
Elevated urban railway.
Stations
12.
Train Capacity Historical
Government opening information cited maximum capacity of 960 passengers per train.
Service
Operating timetable and headways are dynamic and should be kept outside stable canonical data.
Fare Control
Automatic fare-control upgraded in 2025 with chip-ID, bank-card, NFC, QR and biometric capabilities.
Operator
Hanoi Metro.
User experience
How people use the infrastructure in practice
Traveler use
Core Benefit
Predictable travel independent of road congestion along the served corridor.
Access
Passengers use elevated stations with controlled paid areas.
Transfers
Network usefulness rises as common ticketing and physical transfers improve.
Last Mile
Walking, bus, bicycle and other feeder modes determine effective catchment.
Dynamic Rule
Keep current fares and timetable in a refreshable service layer.
Driving safety
Rail Safety
Passengers should follow platform, escalator, door and station instructions.
Road Interface
Most railway operation is grade-separated, reducing direct road conflict.
Emergency
Use station/operator instructions during service disruption.
Accessibility
Verify current station-specific lift/escalator status for mobility-sensitive trips.
Rule
Do not infer current service frequency from historical opening schedules.
Before a long drive
Check current service hours
Use current fare/payment information
Identify the correct station exit
Plan first/last mile
Allow transfer time
Check accessibility needs before travel
Economic geography
How connections translate into economic value
Freight & logistics
Role
Passenger metro, not a freight railway.
Indirect Benefit
Can reduce some road passenger demand and improve worker access along the corridor.
Industrial Access
Not designed as an industrial freight connector.
Rule
Do not attribute freight capacity to the line.
Interchange economics
Why It Matters
Station catchments and transfers determine economic value.
Good Node
Safe walking
Bus connections
Mixed-use density
Clear wayfinding
Common ticketing
Poor Node
Hostile road crossings
Weak feeder service
Disconnected development
Planning Insight
Measure door-to-door access, not only distance to a station.
Industrial investment
Positive Effects
Worker accessibility
Transit-oriented commercial demand
Reduced dependence on car access for some sites
Due Diligence
Walking distance to station entrance
Pedestrian crossings
Bus interchange
Actual passenger catchment
Land-use controls
Warning
Station proximity alone does not guarantee successful TOD.
Regional effects
Mobility
Creates a reliable public-transport spine along a congested corridor.
Learning Effect
Provides Hanoi with operating, maintenance and passenger-management experience.
Land Use
Stations can support denser mixed-use development where planning and pedestrian access align.
Network Effect
Benefits rise disproportionately as more metro lines connect.
Caution
Ridership and economic impact depend on the whole public-transport system.
Daily commuters
Reliable travel along the southwest corridor.
Students and workers
Access to dense education, residential and employment areas.
Transit-oriented businesses
Potential station footfall and improved accessibility.
Hanoi transport system
Operating experience and a base for network integration.
Tourism
Faster access changes destination demand
Benefits
Simple rail access to parts of western Hanoi
Predictable travel time
Integration potential with broader metro network
Risks
Limited direct coverage of many major visitor sites
Destination Rule
Use the line as one leg of a multimodal trip, not a citywide tourism network by itself.
Capacity & resilience
Where performance, resilience and environmental constraints matter
01
Last-mile access
Poor walking or feeder connections reduce ridership.
Response
Improve pedestrian and bus integration.
02
Network isolation
A single line has limited citywide reach.
Response
Build transfer connections and common fares.
03
Peak crowding
Demand concentration can affect comfort.
Response
Adjust service dynamically.
04
Station-area design
Large roads can weaken catchments.
Response
Prioritize safe crossings and station-oriented public realm.
Resilience
Power
Rail operations depend on stable traction and station power.
Weather
Elevated infrastructure requires wind, heat and storm operating procedures.
Redundancy
Bus and road networks provide alternative mobility during disruption.
Maintenance
Preventive maintenance is essential for high-availability service.
Environment
Benefits
Electric mass transit
Potential road-traffic substitution
Compact transit-oriented development
Impacts
Energy use
Noise at elevated sections
Infrastructure maintenance
System Insight
Environmental benefit depends on ridership, electricity mix and mode shift.
Planning & policy
Network Role
Line 2A is one operating foundation of Hanoi's much larger planned metro network.
Integration
Hanoi is moving toward common technical and fare systems across lines.
TOD
Future network planning increasingly links metro investment with transit-oriented urban development.
Rule
Separate this operating line from future planned lines.
Due diligence
What decision-makers should verify
Decision checklist
Measure walking catchment
Check zoning/TOD rules
Assess feeder-bus integration
Separate footfall from purchasing demand
Review station access barriers
Model future network transfers
Interpretation
Common mistakes when reading the infrastructure
Do not assume
The line is not under construction; it has operated commercially since 2021.
Historical opening headways are not permanent current schedules.
Project investment cost is not the same as annual operating cost.
It is a passenger metro, not freight rail.
Station proximity alone does not create TOD.
History
How the infrastructure reached its current form
2009
Project approval
The urban railway project enters formal investment implementation.
2011
Construction begins
Civil construction starts on the elevated Line 2A corridor.
2016
Investment adjustment
The project investment is adjusted to about VND 18.002 trillion.
2020–2021
System testing and acceptance
Full-system trials and acceptance prepare the railway for service.
2021-11
Commercial operation begins
Passenger service starts between Cat Linh and Yen Nghia.
2025-12
Automatic fare-control upgrade enters operation
New multi-standard cashless and identity-based fare technology is deployed across all 12 stations.
2026
Network integration deepens
Common fare-control and metro-network expansion become the main strategic context.
Glossary
Useful infrastructure terms
Metro
High-capacity urban passenger railway with frequent service and dedicated infrastructure.
Line 2A
Official line designation commonly associated with Cat Linh–Ha Dong.
Depot
Facility for train storage, inspection and maintenance.
AFC
Automatic Fare Collection system controlling ticket/payment access.
TOD
Transit-Oriented Development: compact mixed-use development organized around high-capacity transit.
Headway
Time interval between consecutive trains.
Connections
Related infrastructure and places
Nhon–Hanoi Station MetroOperational and developing sections of the line are expanding rapid transit from western Hanoi toward the centre.
Questions
Frequently asked questions
Is Cat Linh–Ha Dong Metro operating?
Yes. Commercial passenger operation began in November 2021.
How long is the line?
13.05 km.
How many stations are there?
12 elevated stations.
Is the line underground?
No. The original Line 2A alignment is elevated.
Who operates it?
Hanoi Metro.
What was the adjusted project investment?
About VND 18.002 trillion in historical project documentation.
What changed in fare technology?
In December 2025 Hanoi put an upgraded automatic fare-control system into operation using multiple cashless and identity technologies.
Are fares fixed forever?
No. Fares and concessions are policy variables and should be checked from current operator information.
Does it carry freight?
No. It is an urban passenger railway.
Why does network expansion matter?
Transfers to other lines greatly expand the number of useful origin-destination pairs.
What determines station value?
Safe walking access, feeder services, density, land use and transfers.
Is the historical 6-minute peak headway still guaranteed?
No. Historical opening schedules should not be treated as current permanent service.
What is the main traveler benefit?
Predictable travel time independent of much road congestion along the corridor.
What should TOD investors check?
Actual station entrances, pedestrian routes, zoning, feeder transit and future transfer plans.
How should live disruptions be stored?
Outside the stable canonical profile in a refreshable service layer.
Why is the line important beyond its length?
It gave Hanoi its first commercial metro operating experience and a base for network-wide integration.
Sources
Primary references
Viet Nam Government News
Full-system trial operation of Cat Linh–Ha Dong urban railway