We planned to ride west on the Walkway and return east on the Mid-Hudson bridge, but encountered an obstruction in mid-span:

Pedestrians and cyclists on diamond-frame (a.k.a., “wedgie”) bikes could sneak past the outrigger legs on the south (left) side of the crane, although that’s surely a Bad Idea for worksite safety. Our big ‘bents wouldn’t fit through, so we just turned around and enjoyed the ride home; a good time was had by all.
While tweaking that picture, I noticed a speck of dirt on the monitor that, upon closer investigation, turned out to be a hidden object:
