Am I understanding correctly that the proposed landing location for that on the north side of the river is the former commuter rail / freight bridge alignment, and so MassDOT and the MBTA (who are listed on slide 16 as stakeholders involved in this process) have apparently decided that they are committed to never building a replacement commuter rail and freight bridge on the traditional (apparently better) horizontal alignment with the new vertical alignment that removes the need for a movable span, but they didn't bother to explain that decision to the public in slides? I notice they didn't bother to include CSX and Pan Am as stakeholders in this decision. Can we get a statement from the freight railroads about how they feel about closing that option off and how happy they are with the current bridge's alignment?
It's also interesting that they choose not to include the East Coast Greenway Alliance as a stakeholder. I was under the impression that the East Coast Greenway includes the Northern Strand Community Trail, and I don't see any plausible way that the East Coast Greenway routing would not end up including this bridge if it gets built. Of course, their ``Most direct route'' claim wouldn't hold for East Coast Greenway usage (but that's not necessarily a deal breaker; the East Coast Greenway's routing guidelines, last time I could find them on the website, claimed that most direct route explicitly isn't their goal).
And why do they think a Silver Line bridge is more likely than a Green Line bridge to actually get funded and built? (My preference is to get a new commuter rail / freight bridge built on the old horizontal alignment, then reuse the existing commuter rail bridge for Green Line maybe shared with bus and maybe with a bike path on the side.)