OK, I did some Google Maps reconnoitering; here's more-or-less the spot where the ROW (or former ROW) that you're alluding to dissolves away to nothing, I think:In this case it is every single parcel from the state line to Taunton River that has lapsed property lines, so there is no "ROW" anymore. Close physical encroachers are only a fraction of the issue as it's several hundred individual property owners who would have to be dealt with. Including, at Ocean Grove, all NON-encroaching adjacent property owners.
Put it this way: the whole of 195 in MA was built with less eminent domaining 55 years ago than the much shorter-mileage Warren Branch would require today. Mostly because sticking closer to the inlets/wetlands than the population density substantially consolidated the number of total property owners they had to deal with. No such luck here.
Sanford Road intersection, Wesport.
East of Sanford Road, it runs for 9 miles essentially due east all the way to downtown New Bedford. And at all the crossings east of Sanford Road, you see two distinct rails, with cross-ties, and the gravel bed beneath--it appears as if it could be rehabilitated to a working rail line without undue exertion. But at Sanford Road--kaput.