Line 4 (Chennai Metro)

Transit line in Chennai, India

Orange Line (Line 4)

Overview
Status| Under Construction
Termini|

* Lighthouse
* Poonamallee Bypass

Connecting lines| Operational (3):
Blue Line Green Line Chennai MRTS
Upcoming (2):
Purple Line Red Line
Stations| 28
Service
Type| Rapid transit
System| Chennai Metro
Operator(s)| Chennai Metro Rail Limited
Technical
Line length| 26.1 km (16.2 mi)
Number of tracks| 2
Character| 10.1 km (6.3 mi) Underground
16 km (9.9 mi) Elevated
Track gauge| 1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification| 25 kV 50 Hz AC overhead catenary

Route map

Legend

| Lighthouse |  |

|  |

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Kutchery Road |  |

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MRTS line

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Thirumayilai Purple Line |  |

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Thirumayilai railway station

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Alwarpet |  |

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Bharathidasan Road |  |

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Boat Club |  |

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Nandanam Blue Line |  |

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Panagal Park |  |

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Kodambakkam |  |

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Kodambakkam railway station

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Power House |  |

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Vadapalani Green Line |  |

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Saligramam |  |

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Saligramam Ware House |  |

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Alwarthirunagar Red Line |  |

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Valasaravakkam Red Line |  |

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Karambakkam Red Line |  |

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Alapakkam Red Line |  |

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Porur |  |

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Porur Bypass |  |

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NH 32:Chennai Bypass Road

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Thelliyaragaram |  |

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Iyyapanthangal |  |

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Kattupakkam |  |

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Kumananchavadi |  |

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Karayanchavadi |  |

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Mullaithottam |  |

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Poonamallee |  |

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Poonamallee Depot |  |

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Chennai Outer Ring Road

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Poonamallee Bypass |  |

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Nazarathpet |  |

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Chembarambakkam |  |

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Thirumazhisai |  |

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Pappanchatiram |  |

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Chettipedu |  |

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Thandalam |  |

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Irungattukottai Sipcot |  |

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Chennai-Bangalore Expressway

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Pennalur |  |

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Sriperumbudur |  |

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Pattunool Chatram |  |

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Irungulam Industrial Estate |  |

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Mambakkam |  |

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Sunguvarchatiram |  |

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Santhavelur |  |

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Pillaichatiram |  |

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Neervalur |  |

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Parandur |  |

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|  |  |  |  |  |

The Orange Line or Line 4 is one of the planned lines of Chennai Metro. It is part of the second phase of the project and the under construction line stretches from Lighthouse to Poonamallee Bypass. The line will consist of 27 stations, out of which nine will be underground and 18 will be at grade or elevated.

## Planning and construction

[edit]

### Phase II

[edit]

The construction of the first phase of Chennai Metro started in June 2009.[1] Commercial operations started on the green line in June 2015.[2][3][4] On 10 February 2019, the extension of blue line was opened, completing the first phase of the metro.[5]

In July 2016, Government of Tamil Nadu announced that the second phase would have three lines totaling 104 km (65 mi) in length with 104 stations.[6][7] Two corridors would extend from Madhavaram connecting with Siruseri and Sholinganallur respectively with the third corridor connecting Koyambedu with Lighthouse. In July 2017, the state government announced an extension in Phase II, involving an extension of line four from Lighthouse up to Poonamallee with an intersection with the Madhavaram–Sholinganallur line at Alwarthirunagar. The line will extend to 26.1 km (16.2 mi) with 16 km (9.9 mi) elevated and 10.1 km (6.3 mi) underground. It will consist of 30 stations including 12 undergrounds stations.[8][9] The stations for the second phase were designed to be smaller than the existing stations operational in the first phase.[10]

On 20 November 2020, foundation stone for the second phase was laid and construction commenced.[11] In November 2022, Alstom was awarded the contract to supply metro coaches for the phase II expansion.[12] In May 2023, CMRL announced a revised plan for the second phase revising the station count on the fourth line to 27.[13] As per the final plan, the fourth line will extend for 26.1 km (16.2 mi).[14]

Chennai Metro - Phase II[15] Line Name  | Terminals  | Length (km)  | Stations  | Status

|
|
|
|

Orange Line | Poonamallee Bypass | Lighthouse | 26.1  | 27  | Under construction

The second phase is estimated to cost ₹63,246 crore (US$7.4 billion) of which initially ₹4,710 crore (US$550 million) was loaned by JICA.[8][16][17] On 14 February 2021, Prime Minister of India announced that the government has set aside ₹63,000 crore (US$7.4 billion) for the construction of phase II and further extension.[18]

### Phase II extension

[edit]

In 2022, the state government proposed an extension plan for the fourth line from Poonamalee to Parandur, covering an approximate 43.6 km (27.1 mi).[19] In early 2024, feasibility report was submitted by CMRL for the proposed expansion of the line, green lighting the same.[20][21]

Chennai Metro - Phase II Extension[22] Line  | Terminals  | Length  | Stations  | Status

|
|
|
|

Orange Line | Poonamallee | Parandur | 43.6 km (27.1 mi)  | 19  | Planned

## Stations

[edit]

Orange Line

S.No  | Station Name[15] | Expected Opening[23] | Connections  | Station Structure
English | Tamil | Station Type  | Platform Level Type
1  | Lighthouse | கலங்கரை விளக்கம்  | December 2027  |  | Underground  | Island
2  | Kutchery Road | கச்சேரி சாலை  | December 2027  |  | Underground  | Island
3  | Thirumayilai | திருமயிலை  | December 2027  |  Chennai MRTS (Thirumayilai )
Purple Line (Under Construction)  | Underground  | Island
4  | Alwarpet | ஆழ்வார்பேட்டை  | December 2027  |  | Underground  | Island
5  | Bharathidasan Road | பாரதிதாசன் சாலை  | December 2027  |  | Underground  | Island
6  | Boat Club | படகு குழாம்  | December 2027  |  | Underground  | Island
7  | Nandanam | நந்தனம்  | December 2027  |  Blue Line | Underground  | Island
8  | Panagal Park | பனகல் பூங்கா  | December 2027  |  | Underground  | Island
9  | Kodambakkam | கோடம்பாக்கம்  | December 2027  |  South Line, Chennai Suburban (Kodambakkam)  | Underground  | Island
10  | Power House | பவர் ஹவுஸ்  | June 2026  |  | Elevated  | TBC
11  | Vadapalani | வடபழனி  | June 2026  |  Green Line | Elevated  | Side
12  | Saligramam | சாலிகிராமம்  | June 2026  |  | Elevated  | Island
13  | Saligramam Ware House | சாலிகிராமம் கிடங்கு  | June 2026  |  | Elevated  | Island
14  | Alwarthiru Nagar | ஆழ்வார் திருநகர்  | June 2026  |  Red Line (Under Construction)  | Elevated  | Island
15  | Valasaravakkam | வளசரவாக்கம்  | June 2026  |  Red Line (Under Construction)  | Elevated  | Island
16  | Karambakkam | காரம்பாக்கம்  | June 2026  |  Red Line (Under Construction)  | Elevated  | Island
17  | Alapakkam Junction | ஆலப்பாக்கம் சந்திப்பு  | June 2026  |  Red Line (Under Construction)  | Elevated  | Island
18  | Porur Junction | போரூர் சந்திப்பு  | June 2026  |  | Elevated  | Side
19  | Porur Bypass | போரூர் புறவழிச்சாலை  | December 2025  |  | Elevated  | Island
20  | Thelliyaragaram | தெள்ளியார் அகரம்  | December 2025  |  Sri Ramachandra Medical College  | Elevated  | Island
21  | Iyyapanthangal | ஐயப்பன்தாங்கல்  | December 2025  |  Iyyapanthangal Bus Terminus  | Elevated  | Island
22  | Kattupakkam | காட்டுப்பாக்கம்  | December 2025  |  | Elevated  | Island
23  | Kumananchavadi | குமணன்சாவடி  | December 2025  |  | Elevated  | Island
24  | Karayanchavadi | கரையான்சாவடி  | December 2025  |  | Elevated  | Island
25  | Mullaithottam | முல்லைத்தோட்டம்  | December 2025  |  | Elevated  | Island
26  | Poonamallee | பூவிருந்தவல்லி  | December 2025  |  Poonamallee Bus Terminus  | Elevated  | Side
27  | Poonamallee Depot | பூவிருந்தவல்லி பணிமனை  | December 2025  |  | Elevated  |
28  | Poonamallee Bypass | பூவிருந்தவல்லி புறவழிச்சாலை  | December 2025  |  | Elevated  | Island

§ under construction

## See also

[edit]

* List of rapid transit systems in India
* List of metro systems

## References

[edit]

1. ^ "Work commences on Chennai Metro". Projects Today. 11 June 2009. Archived from the original on 25 August 2017. Retrieved 16 August 2010.
2. ^ "Chennai Metro one stop short of dream run". Deccan Chronicle. 31 August 2014. Archived from the original on 4 March 2016. Retrieved 6 June 2016.
3. ^ "Conditional clearance for Metro Rail". The Hindu. 28 April 2015. Archived from the original on 14 January 2016. Retrieved 7 June 2016.
4. ^ Chennai Metro Newsletter - August 2015 (PDF) (Report). Chennai Metro. 29 June 2015. Archived (PDF) from the original on 20 October 2023. Retrieved 7 June 2023.
5. ^ Simhan, TE Raja (10 February 2019). "PM Modi inaugurates Chennai Metro Rail's final leg". The Hindu Businessline. Archived from the original on 26 October 2020. Retrieved 13 February 2019.
6. ^ Sekar, Sunitha (2 August 2016). "1800 km, 180 stations: Unveiling Phase II of Metro". The Hindu. Archived from the original on 26 December 2016. Retrieved 24 January 2017.
7. ^ Sekar, Sunitha. "Detailed project report for Phase II of Metro Rail ready". The Hindu. Archived from the original on 27 December 2016. Retrieved 24 January 2017.
8. ^ a b "Project status of Chennai Metro". Chennai Metro Rail Limited. Archived from the original on 26 September 2016. Retrieved 16 August 2010.
9. ^ "Metro's second phase to go up to Poonamallee". The Hindu. 20 July 2017. Archived from the original on 26 February 2020. Retrieved 1 October 2017.
10. ^ U, Tejonmayam (28 December 2016). "Chennai: Metro rail to trim stations under phase 2". The Times of India. Archived from the original on 8 February 2017. Retrieved 24 January 2017.
11. ^ "Amit Shah to lay foundation for Chennai Metro's phase II project". The Hindu. 17 November 2020. Archived from the original on 28 April 2024. Retrieved 1 December 2023.
12. ^ "Alstom wins €98 million contract to design and manufacture 78 metro coaches for Chennai Metro Phase-II" (Press release). Alstom. 11 November 2022. Archived from the original on 16 December 2023. Retrieved 1 December 2023.
13. ^ "Chennai metro scraps nine stations in phase 2". The Times of India. 14 May 2023. Retrieved 1 May 2024.
14. ^ "Phase II– S98 (Anaimalai) TBM Breakthrough at Venugopal Nagar Shaft" (PDF) (Press release). Chennai Metro Rail Limited. 7 June 2023. Retrieved 1 May 2024.
15. ^ a b Chennai Metro rail phase II (PDF) (Report). Chennai Metro Rail Limited. Retrieved 1 May 2024.
16. ^ "Phase-II Chennai metro project to cost Rs 36,000 cr". Business Standard. 2 March 2014. Archived from the original on 16 December 2023. Retrieved 1 December 2023.
17. ^ "JICA extends ODA Loan of INR 4710 Cr for Chennai Metro Rail Project Phase 2 (II)". JICA. 21 June 2022. Archived from the original on 16 December 2023. Retrieved 1 December 2023.
18. ^ Dipak K, Dash. "Ground work for Chennai metro rail phase-2 hit". Times of India. Archived from the original on 18 February 2021. Retrieved 19 February 2021.
19. ^ "Detailed feasibility report for Chennai Metro Rail's Phase 2 extension to be ready in three months". The Hindu. 26 March 2023. Archived from the original on 28 April 2024. Retrieved 1 December 2023.
20. ^ "CMRL submits Detailed Feasibility Reports for Phase II project extension". The Financial Express. 22 September 2023. Archived from the original on 29 April 2024. Retrieved 30 April 2024.
21. ^ "Chennai Metro Rail submits report to extend connectivity all the way to second airport site at Parandur". The Hindu. 4 January 2024. Archived from the original on 30 April 2024. Retrieved 30 April 2024.
22. ^ "Plans for 44-km metro line to parandur airport likely within a year, may have 19 stations". Times Now. 22 April 2024. Archived from the original on 2 May 2024. Retrieved 2 May 2024.
23. ^ Sekar, Sunitha (4 March 2025). "By July 2026, Chennai Metro Rail will extend connectivity till Kodambakkam via double decker stretch". The Hindu. ISSN 0971-751X. Retrieved 22 March 2025.

* v
* t
* e

Chennai Metro

Orange Line 4

Under
Construction

* Lighthouse
* Kutchery Road
* Thirumayilai ■
* Alwarpet
* Bharathidasan Road
* Boat Club
* Nandanam ■
* Panagal Park
* Kodambakkam
* Kodambakkam Power House
* Vadapalani ■
* Saligramam
* Saligramam Ware House
* Alwarthiru Nagar ■
* Valasaravakkam ■
* Karambakkam ■
* Alapakkam ■
* Porur Junction
* Porur Bypass
* Thelliyaragaram
* Iyyapanthangal
* Kattupakkam
* Kumananchavadi
* Karayanchavadi
* Mullaithottam
* Poonamallee
* Poonamallee Bypass

|

Extension
During Phase-2

* Nazarathpet
* Thirumazhisai
* Chembarambakkam
* Kuthambakkam
* Pappanchattiram
* Chettipedu
* Thandalam
* Irungattukottai
* Pennalur
* Sriperumbudur
* Sipcot
* Mambakkam
* Sunguvarchattiram
* Neervalur
* Parandur

Depot(s)

* ■ Poonamallee (TBC)

See also

* List of Chennai Metro stations
* Chennai Metro Rail Limited

Bold represents terminal station on the respective main or branch line
*Stations in italics are Under Construction

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