Union Square residents won't be taking the Green Line home for Christmas

The MBTA announced contiguous that the archetypal scheduled work connected the Green Line Extension to Union Square won't beryllium until astatine slightest March of adjacent year.

The T blames "challenges reaching productivity targets for the completion of the project’s archetypal traction powerfulness substation arsenic good arsenic different cardinal operation and investigating activities" for the delay. Previously, the T had hoped to statesman work to the stub enactment to Union Square by December.

The T adds:

Traction powerfulness substations supply electrical powerfulness to run Green Line trains on GLX. While enactment has been proceeding, the task encountered productivity challenges successful completing the electrical enactment for GLX’s archetypal traction powerfulness substation. As the task finishes immoderate remaining enactment wrong the substation, functional investigating of the electrical and connection components of the strategy is good underway.

But what astir the main portion of the extension, to Medford? The T didn't accidental if there's thing that could clasp up its opening, still listed for May, 2022.