Green Line Extension Constrution Update

Starting this month, construction on the Green Line Extension (GLX) will continue to ramp up. Crews will begin to excavate test pits, remove trees along the Commuter Rail line (not along city streets), implement pest-control measures, work on utilities, move heavy equipment into place, and engage in pre-construction surveys of property.

The Green Line Extension project is expected to be complete in 2021, and this summer heavier construction will begin, including some night and weekend work. There are a number of ways to stay informed about construction impacts near you. Sign up for alerts by emailing and noting that you’d like to get GLX updates. Contact the 24-hour Green Line Extension hotline at 855-GLX-INFO or You may call Somerville Constituent Services at 311 (617-666-3311 from a cell phone) or visit

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