being from massachusetts most of my life i have adapted the new england approach, once something is known a certain way, it will always stay that way. period.
The name of the road is Yankee Division Highway. There are two routes, I-95 and MA-128, that follow this road before splitting apart (or ending) at each end of the Highway.
128 is 2 to the 7th power, the number of bits in a really wide data bus, and the number of characters in the ASCII character set. It fits the highway's high-tech history.
Long-timers will recall when mini-computers walked the earth and the state renamed 128 "America's Technology Highway" at a ceremony on the roadside in Waltham, where they unveiled one of those big blue signs that do absolutely nothing to direct motorists (not unlike those "Entering Neponset Valley Watershed" signs further south - whenever I pass one I always wonder what I'm supposed to do with that information)
Then, of course, the veterans got all lathered up about how the damn commie pinkos on Beacon Hill were dissing the memories of the Yankee Division, so the state had to beat a hasty retreat and change "Highway" to "Region" on the sign, because, as somebody else has mentioned here, the official official name of the highway is the Yankee Division Highway.
COMMUNITIES CONNECTED BY WATER
... shouldn't it have been Route 256, instead of 495?