None of it?
I don't get the question. The decked over parts of the corridor are to the east of where this bridge is located. The only other option here would be a tunnel, which poses its own set of constraints.
The bridge is immediately next to the decked over corridor. Just completing the decking would create a land bridge right next to where the planned bridge would go, except it would be a more natural and seamless crossing and contribute to the goal of RailDeck Park. There are clearly no sight line issues because the Strachan Overpass was designed and built with the rail operators’ input.