So first off, I have this new plan for a rail that will go from the pre existing line that connects weston, little saigon and DMT park and extend it to Athyras Central and the planned transportation hub.
This is how it will look like: (sorry for potato quality, not good with editing maps)
To accomodate the new line, rails will be dug only under the roads of Athyras. One of the Athyras stops at the ACT will be modified for use of this new line
Also, in an unrelated note, I want station space at Viktoria to accomodate a transcontinental line