Delhi metro Violet Line extension inaugurated
https://www.metro-report.com/news/news-by-region/asia-pacific-ex-china/single-view/view/delhi-metro-violet-line-extension-inaugurated.html
Now that total length of Delhi metro Violet Line approaches 50km, the line will need rapid trains to let passengers move more rapidly.
Though it's difficult to choose which stations they should pass through, it's effective for promoting people along the line to use metro systems.
It's not only Delhi Metro, but also almost all of the metro systems around the world that don't have such systems.
Like metro systems in Japan or Seoul, there should be that kind of the systems.
