Farnumsville to Rutland
Long enough to be its own route. Has run basically the same route since 1930. However, for a while (at least 1966 until 1972), 122A used I-290 and what would become I-190 from Quinnipiac St to West Boylston St.
[flickr-gallery mode=”search” tags=”MA 122A” user_id=”80252055@N02″]