An MRT system for colombo city is a must and it has to be underground at least for the first 5KMs radius from within colombo city (FORT). With the growing population in colombo city traffic congestion is increasing day by day. If our government could somehow invest on something like this it would benefit for the future. I dont think elevated monorails or LRT would do much to reduce traffic congestion. just my personal opinion. This thread was started almost 5 years ago yet sad to see our politicians have done nothing regarding these issues.
Just for your information the Chennai and Mumbai suburban systems were developed when the population of the cities were much smaller...Chennai was much smaller than what Colombo is today when services began
Metro is not a failure in the above mentioned cities. Please don't make false claims. So far 16 Indian cities are building metros/subways and another dozen cities planning for it. By 2030, more than 30 Indian cities would have operational metro. If Metro is a big failure in Mumbai, Bangalore and Chennai which are some of the primary cities of India.. why would other cities even dare to build it?
You don't need 6-7 million population for Metro. All you require is vision and money to implement that vision into reality. Metro is a Public transport. Public transportation provides personal mobility and freedom for people from every walk of life. Better and Improved public transportation means better and improved lifestyle. Not only that, every $1 invested in public transportation generates approximately $4 in economic returns. Every $1 billion invested in public transportaiton supports and creates tens of thousands of jobs.
Those figures for Chennai are very outdated and in all probability incorrect. I don't have latest data for Chennai but Mumbai urban agglomeration's PPP GDP as of 2015(?) was appx. $368 billion and per capita income was $16,881. So I reckon Mumbai metro's GDP to be around $280-290 billion and PPP per capita income even higher.
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That's called Urbanisation. Almost every developed country on earth has 60-70-80 percent population living in Urban areas. India is still less than 40% urban. I am happy that more migrants are flocking to cities and urban areas... it's a sign of economic development.