I first noticed something was weird with webster ave looking at a current map:

There's a weird discontinuity in webster av between cambridge st and willow st. It looks like it wants to run in a straight line, but then it stops for some houses. A closer look:

You can see that there are at least three discontinuous fragments of webster ave left. There are some buildings angled to align with a street that isn't there. And all the houses that don't match look very similar in similar roof coloring, angling, and sizing.

I was pretty sure that there had once been a single webster ave that went through the area, but wanted to find out for sure. Looking at a 1930 map, it's pretty clear that there was:

Looking a little later, a 1969 USGS aerial survey shows what I think is the development under construction, but could be some sort of industrial use of the space:

My guess, primarily from the time of the construction, is that this was built as some kind of public housing development, but I can't find anything to support this online.