Diary of a rail fan in Kansai,Japan(Ver.2)

About world's rail news, general news, my train pictures, and travel diary)

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Why do they build a new rail line?

Asian Development Bank finances Delhi commuter rail project
https://www.railwaygazette.com/infrastructure/asian-development-bank-finances-delhi-commuter-rail-project/57188.article

Before reading the detail of this article, I thought that transport service from Delhi to its satellite cities would use conventional Indian Railway network. But, in fact, this project seems to build new railway.
I wonder if conventional railways are so congested that they cannot be used.