The capital and largest city of Tamil Nadu, India, formerly known as Madras.
The £4bn expressways form a diamond linking Delhi with the country's three other largest cities, Mumbai, Chennai and Calcutta, marking the beginning of more than £35bn of road projects.
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A district of Tamil Nadu, India, containing most of metro Chennai.
The £4bn expressways form a diamond linking Delhi with the country's three other largest cities, Mumbai, Chennai and Calcutta, marking the beginning of more than £35bn of road projects.