Doubling the entire route within 2 years is literally impossible bro , even the SBC-TK doubling was done in SR regime. SWR will take lots of time. It all depends which zone CORE takes charge for that. It will take minimum 5 to 6 years for entire route to be doubled. Now Arsikere to Hosadurga is doubled, Chikjajur to Hosadurga is going on.