Mostly CRS has already approved during Dharwad - Unkal Doubling. SWR did show them work that time & as speed will be slow due to turnouts etc, Speed trials wasn't necessary.
Hubballi - Unkal also CRS didn't done, but it is shown as Double line here.
In...
more... SWR PR - They have mentioned 6 Main lines entering into Yard - 2 from Gadag, 2 from Bangalore & 2 from Londa.
They have also mentioned Doubling connectivity towards Hubballi south along with Kusugal & Unkal side.
Run through Up & Down Main line from Londa end to Bengaluru end & vice versa with Full speed due to elimination of 15kmph Speed Restriction on ML.
Also I saw one Hubballi Rail users page mentioning UBL - SUBL is doubled.