i traveled 6 months back
but as for doubling, PUNE-DD is complete, DD-SUR work has been done quite a lot but not near completion (this is 6 months back, currently work may be close to completion)
electrification in DD-SUR is only in stretches, but you can see OHE masts in quite a few places.
i was sitting on opposite sides of tracks on both...
more... up and down journey so wasn't able to take the pics for doubling :(