The speed restriction that encompassed the entire length of the Green Line has been lifted and replaced with more targeted block speed restrictions, Boston’s MBTA announced. Block speed restrictions are in place on the Green Line, which represents about 18% of track.
MBTA test trains have confirmed that all speed signs on the Green Line are in place to safely implement block speed restrictions.
A block speed restriction is a length of track that may include multiple defects that need to be investigated or mitigated. As each defect is validated and corrected as needed, the length of the block speed restriction will be reduced until the block is fully removed.
System-wide speed restrictions were previously replaced with block restrictions on the Orange, Blue, Red, and Mattapan lines.