The Etarsi - Bhopal ghat section has some pleasant surprises. For most of the ghat section, the up and down lines follow significantly different routes. They only come together for small intervals only to move apart again. Was this a single line that was doubled later? That might explain the differences in alignment.
Pictured: A bridge on the BPL - ET line, seen from the ET - BPL line, amid some lush greenery. I was traveling in the 12615 MAS - NDLS Grand Trunk Express today when I snapped this. The...
more... bridge was some 500 or so metres from us, if not a touch more; an example of how drastically different the alignments are would be the fact that the ET - BPL line doesn't have a corresponding bridge on it.