The set back from the bridge to my building is about 5-10x as far from my window as an elevated train line running on an avenue would be.
I have new windows, plus a second set of quiet windows installed within the windows. Essentially quadruple pane windows. It makes them unusable for ventilation. Plus I have sound deadening curtains, sound dampeners on walls, etc.
Believe me, it is loud. There is no mitigation you can do to make it not noticeable. You can only make it tolerable. The cost to get it to that level is not insignificant.