Here are the upcoming lines of the Chennai Metro and their expected completion dates:
|Line||Start Station||End Station||Expected Completion Date|
|Line 3||Madhavaram Milk Colony||SIPCOT 2||December 2025|
|Line 4||Light House||Poonamallee||December 2025|
|Line 5||Madhavaram Milk Colony||Sholinganallur||December 2026|
|Line 6||Thirumangalam||Avadi||December 2027|
|Line 7||CMBT||Avadi||December 2028|
The Chennai Metro Phase 2 is expected to be completed and opened in phases from 2025 onwards. After phase 2 is built and completed in 2028 (estimated), Chennai’s metro network will become roughly 173 km long.