Southern Java double-tracking inaugurated
https://www.railwaygazette.com/infrastructure/southern-java-double-tracking-inaugurated/57560.article
As well as double-tracking, expansion of KRL Jabodetabek or a kind of urban railway systems should be accelerated to solve heavy traffic jam caused by commuters on vehicles. Compared with these commuters, intercity passengers are fewer.
So, this double-tracking won't contribute to relieving track jam.