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Chennai Outer Ring Road (ORR), Tamil Nadu, India




Key Data


Chennai's Outer Ring Road (ORR) is a 62.3km project being built in two phases around the Chennai Metropolitan Area (CMA) in Tamil Nadu, India. The project will connect the GST Road from Vandalur to the Tiruvottiyur Ponneri Pancheti (TPP) Road in Minjur. The key objective of the project is to allow heavy vehicles to travel outside of the city, minimising traffic congestion within the city central areas.

Land for the project was acquired in two phases. For the first phase, Chennai Metropolitan Development Authority (CMDA) acquired 29.65km of land between national highway (NH) 45 and NH205, covering 29 villages. The second phase acquired approximately 30km of land from Nemilicheri to Minjur, covering several villages. The project aims to boost real estate prices and commercial activities in the surrounding areas.

A detailed feasibility report (DFR) for the development of the ORR has been completed. A detailed project report (DPR) was prepared after the DFR had been approved by the government. The project extends up to an area of 545.08ha with a total estimated cost of INR20bn ($380m).

In August 2009, a consortium of GMR Group and NAPC received the order to build the first phase of the ORR project on a public-private partnership basis. Construction of Phase I started in 2010. It was completed in June 2013 and commissioned in March 2014.
The INR10.75bn second phase of the project was approved by the Tamil Nadu government in January 2013.
Phase II will be a 32km six-lane road connecting Nemillichery on NH205 with Minjur on the TPP road via Padayanallur on NH5. The construction will be based on a design-build-finance-operate-transfer (DBFOT) system.


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A detailed feasibility report (DFR) for the development of the ORR has been completed. A detailed project report (DPR) was prepared after the DFR had been approved by the government. The project extends up to an area of 545.08ha with a total estimated cost of approximately INR20bn (approximately $380m).

In August 2009, a consortium of GMR Group and NAPC received the order to construct the first phase of the ORR project on a public-private partnership basis. Construction of phase I of the project was started in 2010. Its completion is expected by June 2013.

The INR10.75bn second phase of Outer Ring Road (ORR) project was approved by the Tamil Nadu government in January 2013. The bids for phase II of the project were under evaluation by that time.

Phase II of ORR will be a 32km six-lane road connecting Nemillichery on NH205 with Minjur on Tiruvottiyur Ponneri Pancheti (TPP) Road via Padayanallur on NH5. The construction will be based on a build-operate-transfer (BOT) system.

Four construction phases for the Chennai ORR traffic project

The first phase comprised two segments. Segment one involved the construction of the Vandalur-Nazarathpet Road at a length of 19.7km, occupying 265.34ha, while segment two included construction of the 9.5km-long Nazarathpet-Nemilicherry Road, spreading over 140.9ha.

"In August 2009, the GMR Group and NAPC consortium was awarded the contract for the construction of Phase I of the Chennai ORR project."

Construction of Phase I started in August 2010. Its completion was delayed and finally finished by June 2013. Phase I included the construction of five major bridges, eight vehicular underpasses, three interchanges, 18 pedestrian subways, three flyovers, two minor bridges and 100 box culverts.

The second phase includes two additional segments, referred to as segments three and four. Segment three involves construction of the 19.1km Nemilicherry-Nallur Road spread across 258ha, while segment four will see the construction of 14km Nallur-Minjur Road over an area of 196ha.

Design and lanes included as part of the Chennai outer ring road

The outer ring road will be 122m wide, 72m of this will constitute the road and rail corridor while 50m will be left for future developments such as public facilities and commercial set-ups. The area will be divided into a 50m road and a 22m railway.

The 50m road will have a two-way transportation corridor, featuring three lanes on either side and two service lanes. The remaining 22m area will be used for the future mass rapid / light rail transit system.

Phase I of the ORR project connects the NH4, NH45 and NH205 highways from Vandalur to Nemilicherry and costs approximately INR10.81bn.

Contractors linked with the traffic congestion project in Tamil Nadu

In August 2009, the lowest bidders, the GMR Group and NAPC consortium, secured the INR11bn ($228m) contract for the Phase I construction works of the Chennai ORR project.


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Under the contract, the consortium constructed the 29.65km highway on a DBFOT basis for an annuity. GMR Group holds a 90% stake and NAPC a 10% stake in the consortium.

The first phase has a concession period of 20 years, which includes the 30-month construction period.

GMR and NAPC were directly involved in some of the construction works, while the rest had been contracted out.

The contract to build Phase II was awarded to a joint venture consisting of GVR Infra Projects and Ashoka Buildcon in July 2013.

Finances behind India's Chennai ORR development

The first phase of the 29.65km transportation corridor was taken up by the GMR-NAPC consortium. Being a public-private partnership, the Tamil Nadu government provided an INR3bn support fund to be included in the promoter's contribution in the project. The remaining funds were planned to be secured through debt and equity.

According to GMR Highways managing director and GMR Infrastructure director O Bangaru Raju, Phase I of the project was financed through INR6.65bn of debt, in addition to equity and government financing.

Outer Ring Road project Map of the Chennai Outer Ring Road project.
Chennai map A Chennai / Marina beach area satellite map.
minimising traffic congestion The key objective of the project is to allow heavy vehicles to transit from outside the city, minimising traffic congestion within the city central areas.