Green Line extension to Medford was set to open in December. Then May. Now it’s on track to open in summer.

 

Green Line extension to Medford was set to open in December. Then May. Now it’s on track to open in summer.  Construction is underway at the opening-someday-soon Ball Square T station.Suzanne Kreiter/Globe Staff

Two weeks after the long-awaited launch of Green Line service to Somerville’s Union Square, the five new stations on the second, much longer branch of the Green Line extension are still heavy construction zones.

When construction began on both branches of the Green Line extension in 2018, they were set to open in December 2021. Then came the COVID-19 pandemic, and the $2.3 billion project faced a series of delays. Last year, the MBTA pushed back the Union Square branch opening to March 2022, citing complications in building its substations, and the delivery date on the Medford branch to May 2022, citing supply chain impacts from the pandemic.   https://www.bostonglobe.com/2022/04/04/metro/green-line-extension-medford-was-set-open-december-then-may-now-its-track-open-summer/