Inner Ring Road, Chennai

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The Inner Ring Road (IRR) or Jawaharlal Nehru Salai or 100 Feet road (SH 2) is a major transportation corridor being developed in Chennai Metropolitan Area (CMA) by the Chennai Metropolitan Development Authority (CMDA). It is approximately 30 km long with three distinct arms viz., Northern arm, Central arm and Southern arm, connecting IT corridor at SRP tools in Tiruvanmiyur,Velachery main road at Vijayanagar, NH 45 (GST road) at Kathipara, NH 4 at Koyambedu, NH 205 at Padi, NH 5 at Madhavaram and joins SH 104 (TPP Road) near Manali.[1]

Details of the corridor[edit]

The IRR is a 6 lane road with different modes of mass transits planned along the median in different arms. It is 30 km long with the section between OTA and Kathipara Junction (1.5 km) being shared with NH 45.

Northern Arm [6 km][edit]

The northern arm of IRR starts from Padi Junction and joins SH 104 (TPP) near Manali. It connects NH5 at Madhavaram Junction. A part of the elevated BRTS is planned along the median of this arm. This section is being strengthened by the NHAI as a part of the port connectivity project.

Central Arm [18 km][edit]

The CMBT in Koyambedu is the terminus for all intercity bus services from Chennai. It is one of the largest bus station in Asia[2] and is accredited with the ISO 9001:2000 quality certification for its quality management and excellence.[2]

The central arm extends from Kathipara Junction and ends at Padi Junction. It connects NH 45 at Kathipara Junction, NH4 at Koyambedu Junction and NH 205 at Padi Junction. A part of elevated metro line 2 is under construction along the median of IRR from Kathipara Junction till Koyambedu. Major landmarks in this section include Thamarai Technology Park, Olympia Technology Park, Hilton Chennai, Kasi Theatre, Udhayam Theatre Complex, Ambika Empire Hotel, Hotel Radha regent, SAF Games Village, State Election Commission, Chennai Mofussil Bus Terminus, Arihant Majestic Towers, Koyambedu grade separator and Vee Care Hospital.

Southern Arm [9.5 km][edit]

The Olympia Tech Park located in the Southern Arm

The southern arm of IRR extends from IT corridor in the form of Taramani Link Road and joins NH 45 at Officers Training Academy before ending at Kathipara Junction. This section is under construction. The Taramani Link Road is being six-laned under TNUDP-III with World Bank assistance while the section from Velachery MRTS station to OTA is being developed newly by the State Highways department. The MRTS Phase II extension is under construction along the median of this section.[3] A Rapid bus way is planned along the Taramani Link Road.

Intersections and flyovers[edit]

The road has several important junctions with grade separators and flyovers. Chief among them are the Kathipara Grade Separator, the Koyambedu Grade Separator, and the Padi Rotary. Other important flyovers include the Thirumangalam flyover.

The Chennai Metro Rail's Corridor II runs along the Inner Ring Road from Koyambedu till Chennai Airport.