Chennai metropolitan area
The Chennai Metropolitan Area (CMA) (or) Greater Chennai is the fourth-most populous metropolitan area in India, the 22nd-most in Asia, and the 40th-most in the world. The CMA consists of the central city of Chennai and its suburbs distributed in Kanchipuram, Chengpattu and Thiruvallur districts. The Chennai Metropolitan Development Authority (CMDA) is the nodal agency that handles town planning and development within the metro area. Since 1974, an area encompassing 1189 km2 around the city has been designated as the CMA and the CMDA has been designated as the authority to plan the growth of the city and the area around it.
Chennai Metropolitan Area
|• Metropolitan area||1,189 km2 (459 sq mi)|
|• Urban||426 km2 (164 sq mi)|
|• Metro||8,452 km2 (3,263 sq mi)|
|• Metro density||1,100/km2 (3,000/sq mi)|
|Time zone||UTC+5:30 (Indian Standard Time)|
Chennai metropolitan area's economy of US$58.6 billion PPP (US$17 billion nominal GDP, 2010) is currently rated the fourth-largest economy in India, ahead of the Bangalore metropolitan area and after the Kolkata metropolitan area.[note 1]
While no official figure has been given for the population in the newly expanded Chennai metropolitan area, the urban population was estimated to be over 10 million in early 2017. The 2011 census figure for the population of the Chennai "UA/Metropolitan region" was 8,653,521.
The CMA is a metropolitan area in Tamil Nadu state, consisting of the state capital Chennai (previously known as Madras) and its satellite towns. Developing over a period of about 20 years, it consists of 8 municipal corporations and 14 smaller municipal councils. The entire area is overseen by the Chennai Metropolitan Development Authority (CMDA), a Tamil Nadu State Government organisation in charge of town planning, development, transportation and housing in the region. The CMDA was formed to address the challenges in planning and development of integrated infrastructure for the metropolitan region. The areas outside Greater Chennai Corporation (Chennai District) like Kanchipuram and Tiruvallur have lacked organised development.
The CMA comprises the city of Chennai, 8 Municipalities, 11 Town Panchayats and 179 Village Panchayats in 10 Panchayat Unions. The CMA has an area of 1,189 km2. It includes the whole of the Chennai District, along with the Ambattur, Gummidipoondi, Madhavaram, Ponneri, Poonamallee, Avadi and Tiruvallur taluks of the Tiruvallur District, Sriperumbudur and Kundrathur taluks of the Kancheepuram District, Pallavaram, Vandalur and Tambaram taluks of the Chengalpattu district.
The CMA falls in three Districts of the Tamil Nadu State viz. Chennai District, part of Thiruvallur District, and part of Kancheepuram District. The extent of the Chennai District (covered in Chennai Municipal Corporation area) is 426 km2 and comprises 55 revenue villages in 10 Taluks [viz. (i) Tondiarpet Taluk, (ii) Perambur Taluk, (iii) Purasawalkam Taluk, (iv) Egmore Taluk, (v) Mambalam Taluk, (vi) Guindy Taluk, (vii) Mylapore Taluk, (viii) Velachery Taluk, (ix) Aminjikarai Taluk and (x) Ayanavaram Taluk. In Thiruvallur District out of total district area of 3,427 km2, 637 km2. in Ambattur, Thiruvallur, Ponneri and Poonamallee taluks fall in CMA. In Kancheepuram District out of 4,433 km2, 376 km2 in Tambaram, Sriperumbudur and Chengalpattu district fall in the metropolitan area.
CMA region has about 3,000 water bodies, most of which have been encroached upon by real estate dealers and small communities.
The Chennai metropolitan area is set to be expanded further, incorporating the entire districts of Tiruvallur and Kancheepuram, and the Arakkonam taluk, Nemili Taluk of the Ranipet district. In future it may expand further. Plans to expand Chennai Metropolitan Area seven folds from existing 1,189 sq.km to 8,878 sq.km appears to be scaled down in view of opposition from the farmer in giving up their agricultural lands. The Government is looking at maximum utilization of the available spaces in the core city and urbanized pockets in the suburbs for residential development. Only area well connected with the available rail infrastructure will be included in the expansion plan of CMA. The extent of expansion will be scaled down from 8,878 sq.km to 3,000–4,000 sq.km. 
|1||Greater Chennai Corporation (Madras Corporation), Avadi Municipal Corporation, Municipalities and Panchayats||Civic management in their area of jurisdiction|
|2||Tamil Nadu Housing Board||provision of plots and ready built houses, Sites and Services schemes|
|3||Metropolitan Transport Corporation||Bus Transport|
|4||Southern Railway||Chennai suburban railway and Chennai MRTS|
|5||Chennai City Traffic Police||Traffic Management Schemes|
|6||Tamil Nadu Electricity Board||Electricity generation and supply|
|7||Public Works Department||Implementation & Maintenance of macro drainage system|
|8||Chennai Metropolitan Development Authority||Urban planning, coordination of project implementation|
|9||Chennai MetroWater Supply and Sewage Board||Water Supply & Sewerage facilities for CMA|
|10||Tamil Nadu Slum Clearance Board||Provision of housing, infrastructure and livelihood programs in slum areas|
|11||Aavin Co-operative society||Providing Milk through co-operative society to the people of Chennai|
|12||CMRL||Metro rail transport department|
- Chennai district (complete)
- Kanchipuram district (partial)
- Tiruvallur district (partial)
- Chengalpattu district (partial)
from Chennai district
from Tiruvallur district
from Kanchipuram district
The first plans to expand the CMA were proposed by the CMDA in 2011. The need for expansion arose as several nearby settlements such as Sriperumbudur, Kelambakkam, Tiruvallur and Maraimalai Nagar had been undergoing rapid development and had to be incorporated under the CMDA planning strategy. Also, the planning bodies of other metropolises in India such as Bengaluru, New Delhi and Hyderabad had already redefined their respective metropolitan regions to include much larger areas and corresponding regional planning was being done. The CMA, however, has not been altered since it was first defined in 1974. The area was limited to 1,189 km2 (459 sq mi) which is among the smallest in the country.
In July 2012, the CMDA suggested two options to the Government of Tamil Nadu for expanding the area:
- The first option includes whole of the Chennai district, Madhavaram, Ambattur, Poonamallee, Ponneri, Gummidipoondi, Uthukottai, and Thiruvallur taluks of the Tiruvallur district, and Alandur, Pallavaram, Tambaram, Sholinganallur, Chengalpattu, Thiruporur, and Sriperumbudur taluks of the Kancheepuram district extending up to 4,459 km2 (1,722 sq mi).
- The second option includes the whole of Chennai, Tiruvallur and Kancheepuram districts and the Arakkonam taluk of Vellore district and extends to a total of 8,878 km2 (3,428 sq mi).
Chief planners of the CMDA have suggested that the second option is more feasible. Another planning model, similar to the National Capital Region was also examined by the CMDA. In order to plan for balanced regional development, developing a larger road network, implementing an integrated transport plan and identifying a Chennai Mega Region have become necessary.
On 3 July 2017 the Government of Tamil Nadu's minister for housing and urban development, Udumalai K. Radhakrishnan announced its intention to expand the CMA to 8,878 km2 (3,428 sq mi). The extension will cover all of Kancheepuram and Tiruvallur districts and Arakkonam taluk of Vellore district, as proposed in July 2012. Having completed a feasibility study, a "strategic regional plan" was now required, and completion of the whole process was expected by July 2018.
On 22 January 2018 the Government of Tamil Nadu issued order G.O. (Ms) No.13 to "declare the intention to include additional areas in the Chennai Metropolitan Planning Area" under section 2, clause (23-a) of the Tamil Nadu Town and Country Planning Act, 1971 (Tamil Nadu Act 35 of 1972). The additional areas to be included were as proposed by the CMDA in 2017. Under Tamil Nadu Act 35 the Tamil Nadu government is required to allow reasonable opportunity (two months according to §10.3) for inhabitants, local authorities and institutions in the area to comment upon or object to such an expansion proposals. Although less than 100 objections to the expansion plans were received, a public interest litigation action was launched at the Madras High Court in March 2018.
- Rankings of cities by metropolitan area GDP can vary as a result of differences in the definition of the boundaries and population sizes of the areas compared and the method used to calculate output
- Mumbai metropolitan area
- Delhi metropolitan area
- Kolkata metropolitan area
- List of metropolitan areas in Asia by population
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