Ballari - Lingasugur and Ballari - Gabbur lines will divert from Sirguppa. Ballari - Sirguppa will be common line for both routes just like Ballari - Rayadurgam is common line for both Rayadurgam - Chitradurga - Chikjajur and Rayadurgam - Pavagada - Tumakuru lines
Screenshot source: South Western Railway Zone system map - 2018