The MBTA has announced the successful completion of its latest infra-structure improvements along the Red Line, including critical and necessary track work, the repair of many floating slabs, work along complicated track areas, upgrading Red Line signals, and much more. The work completed during this Red Line diversion was incredibly important to building upon investments and progress we have made to date on the Red Line over the last three years. Red Line Work Accomplished:The 2024 Track Improvement Program was an ambitious and bold initiative designed to eliminate all existing speed restrictions through major track repairs and replacements. Next spring, the MBTA will begin construction on a new work vehicle tunnel in North Cambridge on the Red Line. While regular, planned maintenance Red Line work will continue to take place in the future, the new Red Line Hi-Rail Access Tunnel will enable shorter shuttle bus service interruptions.