CT line in Ashley Falls to VT line in Williamstown via Great Barrinton and Pittsfield.
Originally NE-4. Appears to basically have same route since the 1930’s, wit the exception of the Lenox and Ashley Falls bypasses. The northern half of the Lenox bypass was built around 1953 and was signed as Bypass 20. Between 1961 and 1966, the southern half was completed, 7 was put onto it, and MA 7A was put onto the old route through Lenox. Around the same time period, the Ashley Falls bypass was built and the same change occurred.