Chennai Bypass Road

Chennai Bypass Road
Chennai Bypass Road in red
Route information
Part of AH20
Maintained by National Highways Authority of India (NHAI)
Length	32 km (20 mi)
Existed	2010–present
Major junctions
From	Puzhal, Chennai district
To	Perungalathur Chennai City, Chengalpattu district
Location
Country	India
Major cities	Maduravoyal, Ambattur, Porur Chennai City
Highway system
Roads in India Expressways National State Asian
Chennai HSCTC

The Chennai Bypass Road is a full-access controlled expressway that interconnects four radial Indian National Highways around Chennai, India covering a distance of 32 km (20 mi) from Perungalathur (near Tambaram) on NH-32 to puzhal on NH-16 via Maduravoyal at a cost of ₹ 4.05 billion. Constructed as part of the National Highway Development Project to decongest the city of transiting vehicles, the expressway interconnects NH-32, NH-48, NH-716 and NH-16. This expressway now forms a part of the circular transportation corridor.

The first phase is a 19 km (12 mi) six-lane fully access controlled carriageway from Perungalathur on the Grand Southern Trunk Road (NH 32) to Maduravoyal which lies on the Chennai–Bengaluru NH-48. A 3-tier trumpet interchange has also been constructed at the starting point at Irumbuliyur. It was inaugurated in April 2008. The road runs through Thiruneermalai, Pammal, Anakaputhur, Tharapakkam, Kovur, Porur, Vanagaram to reach Maduravoyal.

The second phase include extending the bypass by 13 km (8.1 mi) from Maduravoyal to Puzhal on the Chennai–Kolkata NH16 and four-laning it. It also includes two interchanges. There are a clover-leaf grade separator at Maduravoyal Junction and a trumpet interchange at Puzhal where the bypass phase II ends.

A 3.2 kilometres (2.0 mi) elevated six-lane corridor forms the part of Phase II being executed currently. This elevated road cuts through the industrial estate in Ambattur. This corridor ends with a road over bridge (RoB) crossing the Chennai–Jolarpet railway line. The elevated corridor was completed in June 2009 at a cost of ₹ 1000 million.

• A 3-tier interchange connecting NH32 at Irumbuliyur. This place is where the bypass begins.
• An elevated cloverleaf interchange at Maduravoyal to connect it with the Chennai Port–Maduravoyal Expressway and the proposed Maduravoyal–Sriperumbudur dry port expressway
• A trumpet interchange at Puzhal^[1]

• 
  The Porur flyover section of Phase I of the Chennai bypass passing through Porur Lake
• 
  The expressway passes through the outskirts of Chennai.

• Coimbatore Bypass Road