South Korea Metro Lines Under Construction — Active Tunnelling, New Stations and Line Extensions

South Korea metro lines currently under construction. Active tunnelling, new subway station builds and rapid transit line extension projects.

South Korea metro and subway lines currently under active construction: new lines being tunnelled through city centres, extensions pushing into new suburban areas and second phases of recently opened routes. Metro construction is among the most complex and expensive of all rail infrastructure projects, requiring deep-bore tunnelling, major excavations and years-long surface disruption. The map shows where urban rapid transit investment is currently taking place.

South Korea currently has 548 railway segments under construction including 442 railway, 40 tram, 4 metro and 62 light rail.

  • South Korea — Metro Map
  • South Korea — Metro Under Construction
  • South Korea — Proposed Metro Lines
  • South Korea — Metro Stations Map
  • South Korea — Metro Speed Map
Under Construction
Other lines
FreakMaps☕

OpenStreetMap contributors

Last update: 2026-05-07

🚂Book tickets:
12Go
🇰🇷South Korea
Motorways
🚇Metro
Under Construction
🗺️

Export & customize

Clip basemap to region is a paid feature. It removes overflow outside region boundaries and keeps edges clean.

Free

Standard map view and watermarked browser exports.

Paid pass

  • Custom presets
  • No brand watermark
  • Region clip - no overflow, clean edges
Examples & what the pass covers →

Export pass

Customise maps and export clean browser PNGs across RailsMaps and FreakMaps.

Secure checkout by Stripe. No subscription.

+ Region clip on export — no overflow, clean edges.

Examples & what the pass covers →
🇰🇷South Korea – Metro Under Construction Map

© 2026Banasik|About|Contact|Terms|Privacy