Governance Chennai expansion to Kancheepuram and Tiruvallur: Why citizens should be concerned April 28, 2018 Laasya Shekhar The CMDA proposes to increase metropolitan area from 1,189 sq.km to a whopping 8,878 sq.km, making Chennai the largest urban region in the country after Delhi-NCR. Citizens, however, find little cheer in that and here’s why.