Segments leading to a Junction box should be Splittable
Currently, when you try to connect an existing segment (segment E) to a segment leading to a Junction Box (Segment L), the WME won't allow to create a Junction.
On the other hand, creating a new segment (segment N), Segment L can be split, but then a saving error will happen (operation not supported).
This different behavior is confusing and it's not easy to understand why it is like that. This mostly looks like a bug to the user when the Junction box is far away and not even on screen.
To fix both problems, WME should allow splitting a segment L if the split happens outside the Junction box area, and update Segment L's ID inside the roundabout.
Jasmeet Kour commented
This is among the most detailed site that I have struck across the web. A very nice article and I would really like to visit here again!
Of course, I meant "junction box" instead of "roundabout" in the last sentence :)