This is one of the few shots i got off of aaroads.com. You can see the R2s on the tapered E double guy arms. This is the same bridge, but not the exact location of the 50's pic.
I remember that these had ITT Series 25s in the 80s before the M250R2s went up. I remember seeing a few of these double guys with OV20s. Rhode Island also had Form 400 Power Packs somewhere on a freeway in the early 80s which I remember seeing with my grandpa.