Good initiative though might not be so easy for railways to implement. As it is this route is choked with it being single line and so many passenger and express trains crossings etc......not that easy for railways.
Good example is suburban trains on Whitefield-Bangalore-YPR route. Even though it is doubled railways is unable to run services during peak hours when it is really required. The line near airport is single line and being doubled.
Hopefully in future they might explore but needs to be done fast