UX - Collapse Neighbour Lines when to/from same destination

[Talie5in]

Having duplicate neighbor lines add's complexity to the view.
Can these be collapsed where the to/from are from the same nodes.

Example

Perhaps light blue where heard is only seen one way, dark blue where it's heard both ways, and the hover box shows both info boxes as one box showing both paths?

Alternatively when clicking on the line it splits the lines out into the green/red seen/heard colors? or green/red arrows on the end or similiar?