|Owner||Chennai Metro Rail Limited (CMRL)|
|Locale||Chennai, Tamil Nadu, India|
|Transit type||Rapid Transit|
|Number of lines||2 (operational), 3 (under construction)|
|Number of stations||42|
|Headquarters||Poonamallee High Road, Koyambedu, Chennai 600107|
|Began operation||29 June 2015|
|Operator(s)||Chennai Metro Rail Limited (CMRL)|
|Number of vehicles||52|
|Train length||86.5 m (284 ft)|
|System length||55 km (34 mi) (operational)|
118.9 km (73.9 mi) (Phase ll – under construction)
15.3 km (9.5 mi) (Line 1 southern extension - dpr in progress)
25 km (16 mi) (MRTS in conversion to broad gauge metro)
|Track gauge||1,435 mm (4 ft 8 1⁄2 in) standard gauge|
|Electrification||25 kV, 50 Hz AC through overhead catenary|
|Top speed||80 km/h (50 mph)|
The Chennai Metro is a rapid transit system serving the city of Chennai, Tamil Nadu, India. It is the third longest metro system in India after Delhi Metro and Hyderabad metro. The system commenced service in 2015 after partially opening the first phase of the project. The network consists of two colour-coded lines covering a length of 55 kilometres (34 mi). The Chennai Metro Rail Limited (CMRL), a joint venture between Government of India and the Government of Tamil Nadu built and operates the Chennai Metro. The system has a mix of underground and elevated stations and uses standard gauge. The services operate daily between 4:30 and 23:00 with a varying frequency of 5 to 14 minutes. As of November 2019, about 121,000 people use the service on a daily basis. There are 52 trains with four coaches each, making a total of 208 coaches, operating in the first phase and its extension.
The system has also planned to takeover the existing Chennai Mass Rapid Transit System by 2021, which would be upgraded to operate using the rolling stock of the Chennai Metro. CMRL was recognised by the International Association of Public Transport in 2011.
Construction of the first stretch began in June 2009, which spanned the seven stations Koyambedu to Alandur over a distance of 10 kilometres (6.2 mi) and began operation on 29 June 2015. As of February 2021, Chennai Central to St. Thomas Mount on the Green line and Wimco Nagar to Chennai International Airport on Blue line are commercially operational which brings the total operational network to 55 km (34 mi) making it the third largest operating metro system in India, after the Delhi metro (347.6 km [216.0 mi]) and Hyderabad metro (69.00 km [42.87 mi]).
Chennai had an established Chennai Suburban Railway network that spanned from Beach to Tambaram, which dates back to 1931 and operated on a metre-gauge line. This service is now being continued after conversion to broad gauge line. The suburban network also consists of two more suburban lines, the west bound Chennai Central–Arakkonam suburban service and the North Line, Chennai Suburban connecting Chennai Central–Gummidipoondi service which began operations in 1985 from the Moore Market Complex. The two above-mentioned lines were being operated from the main platforms of Chennai Central station until 1985 after which they were shifted to the adjacent Moore Market Complex. The first phase of Chennai Mass Rapid Transit System between Chennai Beach and Thirumayilai opened in 1997 with extension to Velachery in 2007. Modeled after the Delhi Metro, a similar modern metro rail system was planned for Chennai by Delhi Metro chief E Sreedharan due to his special interest in the Chennai city.
In 2007–08, ₹50 crore (US$7.0 million) was sanctioned for preliminary work, which included a Detailed Project Report to be prepared by the Delhi Metro Rail Corporation. The project was approved by the state cabinet on 7 November 2007 and was to be executed by a Special Purpose Vehicle, the Chennai Metro Rail Limited (CMRL). Seven lines were planned by the DMRC for the Chennai Metro network. Planning commission gave in-principle approval for the project on 16 April 2008. On 21 November 2009, a deal was signed with the Japan Banking Corporation for a loan.
In February 2009, Hyderabad-based Soma Enterprise was awarded a ₹199.2 crore (US$28 million) contract for the construction of a 4.5 kilometres (2.8 mi) long viaduct along the Inner Ring Road. In March 2009, a five-member consortium led by Egis Rail SA, France was awarded US$30 million contract for general consultancy contract. On 20 May, CMRL started to evaluate the integration of metro corridor with the planned grade separator at the junction of Arcot Road and Jawaharlal Nehru Road. The construction started on 10 June 2009 with the piling work for the elevated viaduct between Koyambedu and Ashok Nagar stretch. In July 2009, tenders were invited for supplying rolling stock and construction of elevated viaducts for Phase I of the metro.
In January 2011, Larsen and Toubro was awarded the contract for elevated viaducts for ₹314.43 crore (US$44 million). In March 2011, Chennai Metro reached an agreement with the Government of Japan for a loan of ₹2,932.6 crore (US$410 million) for the second phase. In June, tenders for the elevated stations of the first phase were awarded to Consolidated Construction Consortium Limited. In August 2010, the contract for supplying rolling stock was awarded to Alstom at a cost of ₹1,471.3 crore (US$210 million). It was announced that the first phase would be extended by 8.9 kilometres (5.5 mi) and Larsen and Toubro was awarded a contract to construct a depot at Koyambedu. In December 2010, DMRC submitted a report for extending Corridor-I from Washemenpet to Wimco Nagar, a distance of 9 kilometres (5.6 mi) at an estimated cost of ₹2,240 crore (US$310 million).
In January 2011, a ₹449.22 crore (US$63 million) contract for design and construction of track works was awarded to a joint venture of L&T and Alstom and a ₹198 crore (US$28 million) contract for supply of lifts and escalators was awarded to a joint venture of Johnson Lifts and SJEC Corporation. In February 2011, contracts were awarded for the construction of underground sections of the first phase. The contract for power supply and overhead electrification was awarded to Siemens for ₹305 crore (US$43 million). Contracts for automatic fare collection (AFC), tunnel ventilation and air conditioning were awarded to Nippon Signal, Emirates Trading Agency and Voltas for ₹109.88 crore (US$15 million), ₹241.83 crore (US$34 million) and ₹196.2 crore (US$28 million).
On 7 April 2012, the Madras High Court dismissed a petition filed by the Indian National Trust for Art and Cultural Heritage challenging the demolition of a building on Anna Salai. In July 2012, the first tunnel boring machine was launched and by October 2012, eleven machines were commissioned to bore tunnels along the underground stretch by three consortiums, namely Afcons-Transtonnelstroy, L&T and SUCG, Gammon India and Mosmetrostroy involved in the construction. On 6 November 2013, the test run along a stretch of 1 kilometre (0.62 mi) track was conducted. On 14 February 2014, the maiden trial run for the metro was conducted between the Koyambedu and Ashok Nagar stations. In August 2014, the metro received the statutory speed certification clearance from the Research Design and Standards Organisation. In January 2015, a report was submitted to the Commissioner of Metro Rail Safety for approval. In April 2015, the Commissioner of Metro Rail Safety inspected the rolling stock and submitted a report to the Railway Board. On 29 June 2015, commercial operations started between Alandur and Koyambedu stations. Almost a year later, on 21 September 2016, commercial operations commenced between Chennai International Airport metro station and Little Mount. Commercial operations commenced in the first underground line between Thirumangalam metro station to Nehru Park metro station on 14 May 2017. The underground stretches – Nehru Park metro station to Chennai Central metro station and Saidapet metro station to AG-DMS metro station were opened a year later on 25 May 2018. On 10 February 2019, the underground stretch from AG-DMS to Washermanpet of blue line was opened, completing 45 km (28 mi) phase 1 of the metro.
Tunnels for the Chennai Metro were drilled using Tunnel boring machines (TBMs) brought from Russia and China. In December 2011, two TBMs were shipped to Chennai from China. A total of 12 TBMs were deployed from July 2012, 8 from Germany, 2 from China, and 1 each from the United States and Japan. The first tunnel work commenced in July 2012 from Nehru Park to Egmore for a distance of 948 meters. By December 2017, upon completion of the tunneling work of the Chennai Metro, all the machines were shipped backed to their origin countries. Each TBM weighed 850 tonnes and was able to drill hard surfaces, creating tunnel passages to connect underground stations. The length of the TBMs was about 85 to 90 meters. Tunnels were bored 50 feet below the surface, and each kilometer of tunneling cost ₹ 3,000 million. The average length of tunneling was 6 to 8 meters a day.
|Line||Terminal||First operational||Last extension||Length
|Stations||Rolling Stock||Track Gauge (mm)||Power||Average Frequency (Minutes)|
|Blue Line||Wimco Nagar||Chennai International Airport||21 September 2016||14 February 2021||32.15||25||52 trains||1,435||25 kV OHE||5|
|Green Line||M.G.R Central||St Thomas Mount||29 June 2015||25 May 2018||22||17||1,435||25 kV OHE||5|
The original Blue Line covers the Anna Salai stretch and Green Line covers the Poonamallee High Road and Inner Ring Road. Phase I and its extension has a total of 208 coaches (52 trains with 4 coaches each).
Phase I Extension
Phase I extension is a 9.051 kilometres (5.624 mi) northern extension of the Blue Line running from Washermanpet metro station to Wimco Nagar. The line runs underground for the first 2.4 km (1.5 mi) until Tondiarpet after which it becomes elevated along the Thiruvottriyur high road and consists of a total of nine stations. The total cost of this project is ₹ 37,700 million and is funded by Japanese International Cooperation Agency.
In 2018, a 15.3 km (9.5 mi) southern extension of the Blue Line from Airport Station, which is currently the southern terminus, to the upcoming Kilambakkam Bus Terminus was announced. In 2019, Larsen and Toubro were engaged by CMRL to conduct the feasibility study, but as of 2021 construction has not started.
Metro man E.Sreedharan, in 2013, stressed on the need of a greater expansion of Chennai metro network by undertaking subsequent phases. In December 2016, it was announced that Chennai Metro Phase 2 would be for 104 km (65 mi) spreading across 104 stations. In July 2017, in a suo motu statement in the State Legislative Assembly, an extension in Phase II, involving an additional cost of ₹ 38,500 million to the original phase II cost of ₹ 850,470 million, was announced. This will involve extension of Line 4 from Lighthouse up to Poonamallee, with the Madhavaram–Sholinganallur and Lighthouse–Poonamallee lines intersecting at Alwarthirunagar. The key focus for Phase 2 is to provide a stable connectivity between the northern (Madhavaram, Thiruvottriyur, Redhills) and southern suburbs (Siruseri, Sholinganallur) and the east parts of Chennai (Light house, Mylapore) to the western part of Chennai city (Porur) and also to western suburb (Poonamallee). Tamil Nadu Road Development Corporation (TNRDC) has also proposed an elevated 17.2 km (10.7 mi) four-lane corridor for the IT corridor from Taramani to Siruseri. CMRL will construct its piers on top of the flyover built by TNRDC.
|Number of stations|
|Line 3||Madhavaram||Siruseri||45.81 kilometres (28.47 mi)||48|
|Line 4||Poonamallee||Lighthouse||26.1 kilometres (16.2 mi)||28|
|Line 5||Madhavaram||Sholinganallur||47 kilometres (29 mi)||46|
|Total||118.9 km (73.9 mi)|
The lines 3, 4 and 5 are proposed to have 48, 28 and 46 stations, respectively. Around 42 km (26 mi) of phase 2 is planned to be underground and the rest to be elevated. A depot is also proposed at Madhavaram, similar to the existing depot at Koyambedu. And the present estimate for the phase 2 is at Rs. 61,000 crore and approval has been received from the state government. Foundation stone for phase 2 was laid on 20 November 2020 and construction for the phase is expected to begin in 2021 once approval is received from the central government. The preparatory work for the second phase of Chennai Metro Rail project has been hit due to delay in the selection of the general consultant (GC) after concerns were raised by more than 50% of bidders on the CMRL shortlisting companies based on their technical qualifications. Addressing an event in Chennai, Prime Minister Narendra Modi on Sunday 14 February 2021 said the Centre has set aside Rs 63,000 crore in this year’s Budget for the second phase of Chennai Metro totaling 196 km, which is one of the largest projects sanctioned for any city in one-go. The map and list of stations for all 3 proposed lines to be part of Phase 2 has also been published by CMRL.
There are also plans to extend the Poonamallee line up to proposed township of Tirumazhisai in the western part of the city by CMRL. Phase 2 is expected to be completed by 2026. Phase 2 will have trains with three and six coaches, making a total of 414 coaches.
The stations in phase II will be smaller at 150 m (490 ft) compared with 220 m (720 ft) in phase I. Phase II will have three depots, namely, Madhavaram (27.8 hectares), SIPCOT (4.5 ha [11 acres]), and Poonamallee (15.4 ha [38 acres]).
The Chennai Mass Rapid Transit System is anticipated to be handed over to CMRL by the Southern Railway. All the stations from Velachery to Beach will be upgraded with the facilities of the metro stations which includes tracks, security, ticketing system and the rolling stock.
When the project was initiated in 2007, the estimated cost of the first phase was ₹14,600 crore (US$2.0 billion) with a forecasted 5% increase. As of 2014, the cost for the first phase escalated to ₹20,000 crore (US$2.8 billion). The cost for the second phase was estimated at ₹44,000 crore (US$6.2 billion) with the project funded by the Japan International Cooperation Agency (JICA). JICA has sanctioned concessional loan amounts of ₹8,877 crore (US$1.2 billion) for the project. Phase 2 is to be funded partially by JICA, AIIB, ADB and NDB.
Chennai Metro runs in standard gauge measuring 1,435 millimetres (56.5 in) and the lines are double-tracked. The rail tracks were manufactured in Brazil and the raw material was supplied by Tata Steel. The average speed of operation is 35 kilometres per hour (22 mph) and maximum speed is 80 kilometres per hour (50 mph). Chennai Metro operates trains from 4:30 AM to 11:00 PM with a frequency of one train every 4.5 minutes in peak hours and every 15 minutes in lean hours. CMRL plans to increase the frequency to one train every 2.5 minutes once footfalls reach 600,000 passengers a day.
There are four types of tickets issued by CMRL for travel in Chennai metro.
1. Single journey tokens, which need to be purchased each time for every journey at the ticket counter or in ticket vending machines available at all stations. The rates vary between rupees 10 and rupees 60 for one journey.
2. Stored value cards (SVC) are pre-paid, rechargeable, travel cards that can be purchased at any ticket counter against a refundable deposit of rupees 50. They can be recharged up to a maximum of rupees 2000. Frequent users of Chennai metro can use this card. They can be recharged at any ticket counter or in automated ticket vending machines available at all stations. A discount of 10% is applicable for the users of SVC. Therefore, the rates vary between rupees 9 and rupees 54 for a single journey.
3. Trip Cards are for persons traveling between the same two stations regularly. The fares are discounted by 20% and are available in 3 types namely, 10 trips valid for 30 days, 30 trips valid for 90 days, and 60 trips valid for 180 days.
4. Tourist Cards provide the cardholders unlimited rides on the Chennai Metro for 1 day. It costs 150 rupees of which 50 rupees is a refundable deposit which can be claimed back on returning the card. This is ideal for persons visiting the city for a short period of time and planning to travel to their destinations by metro.
Starting from the Diwali day, 27 October 2019, CMRL announced that there will be a discount of 50% for all journeys taken on Sundays and public holidays. This discount will be applicable with single journey tokens (rupees 5 to rupees 30) and Stored Value Cards (rupees 4 to rupees 27).
Order of Operation
|Green Line||Alandur||Koyambedu||29 June 2015|
|Blue Line||Chennai International Airport metro station||Little Mount||21 September 2016|
|Green Line||Thirumangalam||Nehru Park||14 May 2017|
|Green Line||Nehru Park||Chennai Central||25 May 2018|
|Blue Line||Saidapet||AG-DMS||25 May 2018|
|Blue Line||AG-DMS||Washermanpet||10 February 2019|
|Blue Line||Washermanpet||Thiruvottriyur||14 February 2021|
Administration and maintenance
The Chennai metro has a depot at Koyambedu with ballast-less tracks of 15 kilometres (9.3 mi). It covers an area of 26 ha (64 acres) and houses 36 trains. The depot houses maintenance workshops, stabling lines, a test track and a washing plant for the trains. It also houses the Operational Control Centre (OCC) where the movement of trains and real-time CCTV footages obtained from the stations and on-board cameras is monitored. The company plans to build a headquarters building near the facility.
To prevent corrosion of train surfaces due to bird droppings, the depot has been fitted with ultrasonic bird repellers and bird strobe lights to prevent birds from entering the depot.
In 2018, CMRL began constructing an elevated depot at Wimco Nagar at a cost of ₹ 2,300 million to maintain and park trains running between Washermanpet and Wimco Nagar. The elevated depot covers an area of 3.5 ha, with provision to station 12 trains. Other facilities in the depot include three inspections lines, one emergency repair line, and a small plant for washing trains. There are also plans to build a multi-storey commercial building above the depot.
For Phase I, Alstom was awarded the contract to supply 168 coaches to Chennai Metro at a cost of ₹1,470 crore (US$210 million) in 2010. Alstom supplied 42 train-sets (metropolis model) composed of four coaches each with each car measuring 22.5 metres (74 ft) in length and can accommodate 319 passengers. The trains have a first-class compartment and a women's section with 14 seats in the first-class car and 44 seats in the normal car. The first nine trains were imported from Brazil and the remaining were manufactured at a new facility set up at Sri City, Tada about 75 kilometres (47 mi) from Chennai. As a part of phase 1 extension Alstom further supplied 10 trains with 4 coaches each making a total of 52 coaches operating in phase 1 and its extension.The trains are air-conditioned with electrically operated automatic sliding doors and a regenerative braking system. The cars operate on 25 KV AC through an overhead catenary system with a maximum speed of 80 kilometres per hour (50 mph).
The trains are connected to the grid via overhead electric cables and are equipped with regenerative braking with a capacity to recover 30–35% of the energy during braking. The metro will require an average of 70 MW of power daily and the electricity will be supplied by Tamil Nadu Electricity Board. Chennai Metro is also planning to use solar power for five of its stations on the elevated corridor, with a production capacity of 200 KW.
A total of 32 stations have been constructed along the two lines of the first phase with 20 underground stations. In the underground sections, a walkway runs along the length with cross passages every 250 metres (820 ft) for the maintenance and emergency evacuation. The underground stations have an average width of 220 metres (720 ft) to 390 metres (1,280 ft) and go up to 50 feet (15 m) deep from the ground level. However, the length of the stations, both underground and elevated, in Phase 1 extension is only 180 metres (590 ft) to save space. The elevated stations have three levels, namely, street, concourse and platform with the concourse level at an average height of 5.65 metres (18.5 ft) and platforms for boarding at 12.6 metres (41 ft) above the street level. Underground stations have two levels and are air-conditioned. The metro stations are equipped to be disabled and elderly friendly, with automatic fare collection system, announcement system, electronic display boards, escalators and lifts. The stations are equipped with non-slippery flooring with grip-rails, audio announcements and Braille facilities to help visually challenged passengers. Paid parking facilities are available for two wheelers at all but three stations and in select stations for four wheelers. parking charges can be paid for through the stored value cards.
- Chennai Suburban Railway: Washermanpet, Chennai Fort, Chennai Park, M.G.R Chennai Central, Chennai Egmore, Guindy, Meenambakkam, Tirusulam and St Thomas Mount
- Chennai MRTS: Chennai Fort, Park Town, Chintadripet and St Thomas Mount
- Chennai Metropolitan Transport Corporation: Broadway, M.G.R Chennai Central, Chennai Egmore, Anna Nagar, Puratchi Thalaivar Dr. M.G.R Bus Terminus, Vadapalani, Ashok Nagar, DMS, Saidapet, Guindy and St Thomas Mount
- Southern Railway: M.G.R Chennai Central and Egmore
- Chennai International Airport
- State Express Transport Corporation: Puratchi Thalaivar Dr. M.G.R Bus Terminus
- Tamil Nadu State Transport Corporation: Puratchi Thalaivar Dr. M.G.R Bus Terminus, Vadapalani and Guindy
- Chennai Contract Carriage Bus Terminus: Koyambedu
As of November 2019, the CMRL has plans to build a 15-km light rail between Tambaram and Velachery connecting with the Chennai MRTS at the Velachery station. Unlike the Metro, the Light Rails can take sharp turns and travel through dense and narrow stretches.
Accidents & Incidents
In August 2012, a construction worker was killed and six others were seriously injured due to a crane boom failure near Pachaiyappa's College. On 10 January 2013, a 22-year-old construction worker was killed and three others were injured at a Metro Rail site on Railway Station Road between Alandur and St Thomas Mount. On 11 January 2014, a crane toppled over, killing a 20-year-old construction worker and seriously injuring one other worker. The accident took place at 6:45 am at the construction site of the Saidapet station. On 17 June 2015, a 30-year-old Software Engineer L Giridharan was killed on the spot when an iron rod fell on him at an under construction Metro Rail station near Officers Training Academy at St Thomas Mount around 9 am. The iron rod also hit a motorcyclist, who escaped with minor injuries.
Chennai metro is the second most expensive in terms of ticket cost per kilometer in the country after Mumbai. In 2019, the Madras High Court questioned the state government on the scientific method it adopted in constructing the tunnels without disturbing the water bodies in the city.
- "Home Page of Chennai Metro Rail Limited". chennaimetrorail.org. Retrieved 16 August 2010.
- "Apurva Varma, new Home Secretary; Pankaj Kumar Bansal, New MD, Chennai Metro Rail". The Hindu. Chennai, India. 24 December 2013. Archived from the original on 25 December 2013.
- "Chennai's Koyambedu-Alandur metro closer to opening". The Economic Times.
- "Chennai Metro services now available from 4.30 a.m." The Hindu. Chennai: Kasturi & Sons. 30 March 2019. p. 4. Retrieved 1 May 2019.
- Sekar, Sunitha (26 August 2019). "Rush hour in the city sees Metro trains running full". The Hindu. ISSN 0971-751X. Retrieved 2 November 2019.
- "Chennai Metro-MRTS merger report in six months". The Hindu. Retrieved 17 June 2017.
- Janardhanan, Arun (2 August 2014). "Chennai Metro rail likely to take over MRTS". The Times of India. Retrieved 2 August 2014.
- "Chennai Metro Rail Newsletter (August 2015)" (PDF). Chennai Metro Rail Limited. Archived from the original (PDF) on 5 October 2015. Retrieved 15 September 2015.
- "83 years of electric suburban rail". The Hindu. 18 April 2014. Retrieved 13 November 2019.
- "What clips EMUs' wings?". The New Indian Express. 29 July 2018. Retrieved 13 November 2019.
- "MRTS services extended". Business Line. 27 January 2004. Retrieved 29 July 2012.
- "Metro is a financial success, not just a technological one". Livemint. 11 September 2007. Retrieved 13 November 2019.
- "Welcome to Delhi Metro Rail Corporation(DMRC) | Official Website". www.delhimetrorail.com. Retrieved 16 February 2018.
- "3 Corridors in Chennai Metro Rail May be Extended by 35 km". The New Indian Express. 26 November 2015. Retrieved 6 June 2016.
- "Center nod for Metro Rail in Chennai". The Times of India. 16 April 2008. Retrieved 20 August 2010.
- "Home Page of Chennai Metro Rail Limited". Chennai Metro. Archived from the original on 14 March 2010. Retrieved 16 August 2010.
- "Soma Enterprise bags Chennai Metro Rail order". Business Line. 19 February 2009. Retrieved 16 August 2010.
- Ramesh, Niranjana (10 March 2009). "USD 30 million contract by CMRL". The Times of India. Retrieved 10 March 2009.
- "Ball set rolling on Vadapalani flyover". The Hindu. 20 May 2009. Retrieved 16 August 2010.
- "Chennai Metro to invite bids for passenger EMUs". Projects Today. 25 July 2009. Retrieved 16 August 2010.
- "CMRL invites bids for construction of elevated viaducts". Projects Today. 25 August 2009. Retrieved 16 August 2010.
- "L&T, Alstom Venture bags Chennai Metro project". @businessline. Retrieved 14 February 2018.
- "Japan commits Rs 10535cr towards six infra projects in India". The Times of India. 29 March 2010. Retrieved 16 August 2010.
- "Japan credit for six infrastructure projects". Business Line. 29 March 2010. Retrieved 16 August 2010.
- "Elevated metro stations to come up at 10 places". The Times of India. 29 June 2010. Retrieved 16 August 2010.
- "Tenders awarded for 10 Metro Rail stations". The Hindu. 29 June 2010. Retrieved 16 August 2010.
- "Alstom to provide 168 cars for Chennai's metro". The Financial Express. 11 September 2010. Retrieved 18 September 2010.
- "First Metro Rolling Stock contract in India". Alstom Transport (Press release). 9 September 2010. Archived from the original on 13 September 2010. Retrieved 18 September 2010.
- Sreevatsan, Ajai (19 August 2010). "Metro Rail set to be extended to Tiruvottiyur". The Hindu. Retrieved 20 August 2010.
- "L&T awarded construction of Metro Rail depot works". The Economic Times. 15 December 2010. Retrieved 3 March 2011.
- "Pursue Phase-II of Chennai Metro: E. Sreedharan". The Hindu. Retrieved 6 June 2016.
- "L&T, Alstom venture bags Chennai Metro project". The Hindu. 22 January 2011. Retrieved 6 June 2016.
- "Metro Rail awards contract for lifts". The Hindu. Retrieved 6 June 2016.
- "Two firms bag 12 underground tunnels & stations work". The Times of India. 1 February 2011. Retrieved 6 June 2016.
- "Gammon India bags two Chennai Metro orders worth Rs 19.47 billion". The Economic Times. 2 February 2011. Retrieved 6 June 2016.
- "Siemens wins power supply contract for Chennai metro". Business Standard. 12 February 2011. Retrieved 6 June 2016.
- "Work on 'double-decker' structure at Arcot Road". The Hindu. 12 September 2011. Retrieved 6 June 2016.
- Sangameswaran, K. T. (5 April 2012). "Plea against razing part of heritage building for Metro Rail dismissed". The Hindu. Retrieved 7 April 2012.
- Raja Simhan, T. E. (24 September 2014). "Chennai Metro Rail set for trial runs between Egmore, Shenoy Nagar by middle of next year". Business Line. Retrieved 2 October 2014.
- Ramakrishnan, T. (6 November 2013). "Chennai Metro Rail Test Run". The Hindu. Retrieved 6 November 2013.
- "Metro Rail Rolls Out a Surprise with Koyambedu-Pillar trial Run". The New Indian Express. 14 February 2014. Retrieved 2 October 2014.
- "Chennai Metro holds trial on elevated section". Business Line. 14 February 2014. Retrieved 2 October 2014.
- "Next up: Chennai Metro". The Hindu. June 2014. Retrieved 6 June 2016.
- "Chennai Metro one stop short of dream run". Deccan Chronicle. 31 August 2014. Retrieved 6 June 2016.
- "Metro rail service likely to begin in November". The Hindu. 31 August 2014. Retrieved 6 June 2016.
- Shivakumar, C (3 January 2015). "1st Phase Metro Tracks Ready for Safety Test". The New Indian Express. Retrieved 6 June 2016.
- Kannan, Ramya (7 April 2015). "Metro Rail safety inspected". The Hindu. Retrieved 7 June 2016.
- "Koyambedu-Alandur metro closer to opening". The Times of India. 7 April 2015. Retrieved 7 June 2016.
- "Conditional clearance for Metro Rail". The Hindu. 28 April 2015. Retrieved 7 June 2016.
- Sekar, Sunitha (28 April 2015). "First Chennai Metro Rail all set to roll out soon". The Hindu. Retrieved 7 June 2016.
- "Chennai Metro First Day of Operation". News Exprezz. 29 June 2015. Archived from the original on 2 July 2015. Retrieved 7 June 2016.
- Sekar, Sunitha (14 May 2017). "Naidu, Palaniswami flag off underground stretch of Chennai Metro". The Hindu. ISSN 0971-751X. Retrieved 29 January 2019.
- Sekar, Sunitha (25 May 2018). "Chennai Metro Rail opens two underground stretches". The Hindu. ISSN 0971-751X. Retrieved 29 January 2019.
- Simhan, TE Raja. "PM Modi inaugurates Chennai Metro Rail's final leg". @businessline. Retrieved 13 February 2019.
- "Tunnel boring machines to bid adieu". The Hindu. Chennai: Kasthuri & Sons. 16 December 2017. Retrieved 17 December 2017.
- Sekar, Sunitha (28 August 2017). "Metro tunnelling draws to a close". The Hindu. Retrieved 30 September 2017.
- "Metro Phase 1 extension tunnelling nears completion". The Hindu. 25 September 2017. Retrieved 29 September 2017.
- "Metro Rail may cover Tiruvottiyur". The Hindu. 22 January 2009. Retrieved 16 August 2010.
- "Jayalalithaa seeks Modi's help for metro rail". Deccan Chronicle. 22 January 2009. Retrieved 16 August 2010.
- "First set of trains for Chennai metro phase 1 extension flagged-off". Business Line. 19 October 2019. Retrieved 6 November 2019.
- "Track work in Metro phase 1 extension to begin soon". The Hindu. 6 December 2018. Retrieved 6 November 2019.
- "Opening of phase-1 Chennai metro extension stretch to be delayed?". The New Indian Express. Retrieved 9 January 2021.
- "Chennai: Trial run between Washermanpet and Wimco Nagar Metro stations successful, says CMRL". The Indian Express. 26 December 2020. Retrieved 26 December 2020.
- "CMRL to do feasibility study on Airport to Kilambakkam route". Dt Next. 14 March 2019. Retrieved 6 November 2019.
- Sekar, Sunitha. "104 km, 104 stations: Unveiling Phase II of Metro". The Hindu. Retrieved 24 January 2017.
- "Metro's second phase to go up to Poonamallee". The Hindu. Chennai: Kasturi & Sons. 20 July 2017. Retrieved 1 October 2017.
- U, Tejonmayam. "Metro to link route planned under monorail network". The Times of India. Retrieved 17 February 2019.
- Sekar, Sunitha. "Detailed project report for Phase II of Metro Rail ready". The Hindu. Retrieved 24 January 2017.
- U, Tejonmayam. "Chennai: Metro rail to trim stations under phase 2". The Times of India. Retrieved 24 January 2017.
- Dipak K, Dash. "Ground work for Chennai metro rail phase-2 hit". Times of India. Retrieved 19 February 2021.
- Sekar, Sunitha (26 December 2018). "CMRL mulls extending line to Tirumazhisai". The Hindu. Retrieved 1 January 2019.
- "Chennai Metro: Corridor-4 extension plans on cards". The New Indian Express. Retrieved 23 January 2021.
- "Metro Rail second phase likely to be completed in six years". The New Indian Express. Retrieved 26 April 2019.
- Sekar, Sunitha (11 March 2019). "Chennai Metro phase II to have three-coach and six-coach trains". The Hindu. Chennai: Kasturi & Sons. p. 2. Retrieved 1 May 2019.
- Sekar, Sunitha (25 April 2019). "For phase II, Chennai Metro will need less private land". The Hindu. Chennai: Kasturi & Sons. p. 3. Retrieved 2 May 2019.
- "Chennai: With Metro coaches and modern stations, MRTS set for big upgrade". The New Indian Express.
- Mahajan, Anilesh S. (25 May 2014). "On the right track". Business Today. Retrieved 9 November 2014.
- "Phase-II Chennai metro project to cost ₹36,000 crore (US$5.0 billion)". Business Standard. 2 March 2014. Retrieved 9 March 2014.
- "JICA funding for Chennai Metro". JIca (Press release). Retrieved 6 June 2016.
- Srinivasan, Meera (3 February 2013). "Countdown to Chennai Metro begins". The Hindu. Retrieved 3 February 2013.
- "Metro rail train zips over city roads". The Hindu. Retrieved 6 June 2016.
- Reporter, Staff (30 March 2019). "Chennai Metro services now available from 4.30 a.m." The Hindu. Retrieved 26 April 2019.
- "Single train trip to equal 16 buses, 300 cars and 600 bikes". The Hindu. 29 August 2012. Retrieved 25 November 2012.
- Soman, Sandhya (26 July 2012). "Metro rail plans to ply a train every 2.5 minutes". The Times of India. 2017 Bennett, Coleman & Co. Ltd. Archived from the original on 4 March 2017. Retrieved 4 March 2017.
- Sekar, Sunitha (11 February 2019). "Chennai Metro: Now, ride from Washermanpet to airport takes just 40 minutes". The Hindu. Retrieved 11 February 2019.
- Sekar, Sunitha (28 October 2013). "Chennai Metro to have 1st class compartment". The Hindu. Retrieved 23 July 2015.
- "Metro fares pegged at minimum of Rs. 10". The Hindu. 2 March 2014. Retrieved 23 July 2015.
- "Tickets issued by CMRL". chennaimetrorail.org. Retrieved 6 November 2019.
- Sekar, Sunitha (24 October 2019). "Beginning this Diwali, Chennai Metro to offer 50% discount on all Sundays, public holidays". The Hindu. Retrieved 6 November 2019.
- Sekar, Sunitha (5 September 2017). "CMRL takes the fight to birds". The Hindu. Retrieved 30 September 2017.
- Sekar, Sunitha (16 July 2014). "Chennai Metro to get a second depot". The Hindu. Retrieved 4 October 2014.
- Karthikeyan, K. (26 July 2014). "High tech control room for Chennai metro". Deccan Chronicle. Retrieved 4 October 2014.
- Shivakumar, C. (20 March 2014). "Skyscraper on 10 Acres to House Metro Rail HQ". The New Indian Express. Retrieved 25 March 2014.
- Sekar, Sunitha (5 May 2018). "Metro Rail extension gathers pace". The Hindu. Retrieved 12 May 2018.
- "Alstom completes in Lapa plant the first train for Chennai metro, in India". Alstom (Press release). May 2013. Retrieved 6 June 2016.
- Sekar, Sunitha (29 June 2018). "Phase II to have three and six-coach Metro trains". The Hindu. Chennai. Retrieved 15 July 2018.
- Sekar, Sunitha (18 July 2014). "All aboard, Chennai Metro". The Hindu.
- "First coach for Chennai Metro by April 2013: Alstom Transport". Business Line. Retrieved 6 June 2016.
- Sekar, Sunitha (28 October 2013). "Chennai Metro to have 1st class compartment". The Hindu. Retrieved 2 March 2014.
- "Alstom to provide 168 cars for Chennai's metro for €243 million (approx. INR 1470 crore)". Alstom (Press release). September 2010. Retrieved 6 June 2016.
- "First ride in a Chennai Metro train". The Hindu. Retrieved 6 June 2016.
- "Metro rail sets up units to power trains, stations to meet year-end deadline to start services". The Times of India. 15 April 2014. Retrieved 18 April 2014.
- Sekar, Sunitha (9 April 2014). "Chennai Metro to tap solar power for stations". The Hindu. Retrieved 18 April 2014.
- Sekar, Sunitha (10 August 2014). "First underground Metro network by December 2015". The Hindu. Retrieved 4 October 2014.
- "மெட்ரோ ரெயில் சேவைக்காக 50 அடி ஆழத்தில் 16 ரெயில் நிலையங்கள் அமைக்கும் பணி தீவிரம்". Dina Thanthi (in Tamil). 28 February 2014. Archived from the original on 2 March 2014. Retrieved 1 March 2014.
- "CMRL's compact stations have their own fan club". The Hindu. Chennai. 29 June 2018. Retrieved 15 July 2018.
- "Chennai Central to be biggest metro station". MagicBricks. 30 August 2011. Archived from the original on 1 January 2012. Retrieved 8 November 2012.
- Sekar, Sunitha (20 January 2014). "No clarity on access at Chennai Metro stations yet, say disabled". The Hindu. Retrieved 6 June 2016.
- "Parking Facilities Availability 2018" (PDF). chennaimetrorail.org. Retrieved 16 August 2010.
- V, Ayyapan (16 February 2010). "Metro Rail to build flyover at Vadapalani". The Times of India. Chennai. Archived from the original on 3 January 2013. Retrieved 15 May 2012.
- Jeeva (29 October 2009). "Flyover planned at Arcot Rd jn to ease traffic congestion". The Times of India. Archived from the original on 3 January 2013. Retrieved 15 May 2012.
- Srinivasan, DMeera (15 May 2012). "Metro, flyover merger at Vadapalani hits road bump". The Hindu. Chennai. Retrieved 15 May 2012.
- Sekar, Sunitha (9 November 2019). "Chennai Metro to build Light Rail between Tambaram and Velachery". The Hindu. Chennai: Kasturi & Sons. p. 3. Retrieved 29 December 2019.
- Manikandan, K.; Srinivasan, Meera (10 January 2013). "Girder crash kills worker at Chennai Metro Rail site". The Hindu. Retrieved 6 June 2016.
- Sekar, Sunitha (11 January 2014). "Metro Rail worker dies as crane topples". The Hindu. Archived from the original on 14 January 2014. Retrieved 6 June 2016.
- "Software techie dies as iron rod falls on him". The New Indian Express. 17 June 2015. Retrieved 6 June 2016.
- "City metro rides second most expensive in India". The Times of India. Retrieved 4 January 2018.
- "Was Metro tunnelling work executed without disturbing water sources, asks High Court". The Hindu. Chennai: Kasturi & Sons. 14 March 2019. Retrieved 1 May 2019.
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