As per latest census it seems Calicut, Cochin,Trivandrum qualify for metro
There are seven metropolitan cities in Tamil Nadu.
4 metropolitan cities
As of October 2023, Nepal has 7 metropolitan cities and 11 sub-metropolitan cities. The metropolitan cities are Kathmandu, Lalitpur, Bhaktapur, Bharatpur, Pokhara, Biratnagar, and Janakpur. The sub-metropolitan cities are Dhangadhi, Nepalgunj, Itahari, Bhimdatta, Hetauda, Birgunj, Butwal, Banepa, Dhulikhel, and Damak.
Quad Cities Metropolitan Area's population is 381,342.
Kumbalam
metropolitan areas
kochi and thiruvananthapuram (state capital) are the busiest cities of kerala.
Ernakulam-Kochi
"Many major United States metropolitan cities are considered to be cities of the future. Some of these cities are Los Angeles, New York City, Chicago, and Washington D. C."
In kerala, no city is approved as a real metro. But, Kochi and Trivandrum are the cities eligible for a metro
Metropolitan cities are often overcrowded because of economic conditions. Since larger cities tend to have more than smaller ones, the also tend to draw more people to them and that is when they become overcrowded.
In the Twin Cities Metropolitan Area.