Outer Ring Road, Chennai
Outer Ring Road, Chennai in red
Highway system

The Outer Ring Road, officially state highway 234 (SH 234),[1] is a major transport corridor being operational along the periphery of Chennai Metropolitan Area (CMA) by the Chennai Metropolitan Development Authority (CMDA). It is 62 km long connecting GST Road at Perungalathur, GST Road at Vandalur, NH 48 (GWT Road) at Nazarethpettai, NH 716 (CTH Road) at Thiruninravur to NH 16 (GNT Road) at Vijayanaallur and to TPP road at Minjur. On 29 August 2010, the then Tamil Nadu Deputy Chief Minister M. K. Stalin laid the foundation for the first phase of the project from Vandalur to Nemilichery covering a distance of 30 kilometres (19 mi). The Road generally covers Developing areas like Avadi West such as Thiruninravur, Pattabiram, Nemilicheri, Muthapudupet, Mittanamallee, Morai, Veerapuram, and Thirumullaivoyal (Avadi SIDCO Industrial Estate). Chennai Outer ring road had a plan of Chennai metro rail CMRL which is going to build up at gap between two roads.


The Project was developed in 2 phases with 2 segments each.

Phase 1

The Phase 1 of the project covers a distance of 29.65 km. 10 Grade separators at major junctions have been planned along this route. It also includes 50 bus bays on both sides and also truck lay-byes for parking of around 100 trucks. Phase I of this project was implemented by GMR, and the project was originally expected to be completed by June 2012. Phase I was thrown open to the public on 29 August 2014 the then Chief Minister of Tamil Nadu J. Jayalalithaa through Video conferencing.

Segment I

The Segment I extends from GST Road (Vandalur) to NH48 (Nazarethpettai) covering a distance of 19.7 km. The development covers an area of about 265.38 Hectares.

Segment II

The Segment II extends from NH48 (Nazarethpettai) to CTH Road (Pattabiram) covering a distance of 9.5 km. The development covers an area of about 140.9 Hectares.

Phase II

The Phase 2 covers a distance of 33.1 km.

Segment III

The Segment III extends from CTH Road (Pattabiram) to GNT Road (Redhills) covering a distance of 18.8 km. The development covers an area of about 258.02 Hectares.

Planned Developments (PPP mode)

Price Waterhouse Coopers (PWC) has done a micro market study on the development of 50 m along the road. It has suggested that the components of the development could include a 5-star hotel, retail segments – including an "auto main street" where the ORR connects industrial suburbs that house automobile giants such as Hyundai, Ford and Renault Nissan – and facilities like multiplex, residential, hospital, commercial, warehouse and green spaces. Developers would be identified through open competitive bidding for these projects.[2]

High-Growth Zone

The region close to NH-45 is seen as a high-growth area covering the Chennai neighbourhoods places Vandalur, Mannivakkam, Mudichur, Thiruninravur, Pattabiram, Muthapudupet, Morai, Malayambakkam-Mangadu, Minjur and Ponneri (Smart City). This would be the location for a 5-star hotel.

Auto Main Street

Localities near Minjur and Ponneri, which are hubs of automobile and component industries, would be the ideal locale for the auto main street, which is a niche retail for the automobile industry for which about 50 acres (200,000 m2) have been earmarked.

Residential Areas

Residential areas have been planned for more than 150 acres near Minjur, Ponneri while residential spaces have been planned at Malayambakkam, Nazarethpettai, Agaramel and Poonamallee.


A major warehouse has been planned in Minjur, Nemilichery (near Pattabiram).

Logistics Park

Pattabiram would have a logistics facility.

Project Status

June 2015:

February 2021:


  1. ^ Ramakrishnan, Deepa H. (11 November 2018). "Chennai Outer Ring Road will now be known as SH 234". The Hindu. Chennai: Kasturi & Sons. Retrieved 18 November 2018.
  2. ^ https://web.archive.org/web/20090812061733/http://www.thehindubusinessline.com/iw/2009/08/09/stories/2009080950711500.htm. Archived from the original on 12 August 2009. Retrieved 24 August 2009. Missing or empty |title= (help)
  3. ^ [1] Archived 17 September 2009 at the Wayback Machine
  4. ^ Highways - Chennai Outer Ring Road Archived 13 April 2010 at the Wayback Machine. Gmrgroup.co.in. Retrieved on 2013-12-06.
  5. ^ Sundaram, Ram (8 February 2021). "CM opens second phase of Chennai Outer Ring Road". The Times of India. Chennai: The Times Group. Retrieved 9 February 2021.