Is there any reason for that ?
As per my understanding, if there is a double line Broad Gauge, it will help a lot since
1) Some of the trains going from jabalpur to nagpur will be able to use the...
more... jabalpur --> gondia --> nagpur section.
2) Trains going from jabalpur towards south would be able to use the jabalpur --> Gondia --> Balharshah section. (Site shows Gondia to Balharshah section is already double line electrified).
Benefits
1) It will save a lot of time for the passengers.
2) Open up another route for going to south.
3) Connect more people to the railways.
4) It will be beneficial for the railways as well, since it will help to decongest the itarsi --> nagpur --> balharshah line.
What do you think ?