Orange Line Transformation Program Update

  Following the 30-day shutdown, the Orange Line Transformation (OLT) program remains in full swing, advancing work on the Wellington Yard and Maintenance Facility, Traction Power Substations and Orange Line Signals. Continue reading to learn more about ongoing and upcoming construction to improve safety, service and reliability for riders.

  As a reminder, newly installed track and ballast settles under the weight and movement of regular train service. For this reason, slow zones have temporarily remained in place, allowing track engineers to confirm when settling is complete and that the track is ready to support trains at full speed.

OLT improvements continue across the Orange Line

• Wellington Yard and Maintenance Facility: Last week crews continued the installation of a new switch machine, track and wires in the south yard. In the coming weeks, crews will continue replacing track in the south yard. In the Maintenance Facility, workers installed new electrical lighting and fire alarm systems and replaced track. Looking ahead, crews will continue the installation of the new fire alarm system.
• Orange Line Traction Power Substation Upgrades: Work continues to upgrade these Substations with new power infrastructure and equipment. This week at Oak Grove Station, crews continued preparations to install the new epoxy flooring system, and at Sullivan Station electrical duct bank repairs were performed. Next, workers will begin installing new electrical equipment in the substation at Oak Grove. At Sullivan Station, crews will install a new electrical power supply to the mobile traction power substations.
• Orange Line Signal Upgrades: The MBTA is in the process of replacing the Orange Line’s analog signal system with new digital infrastructure. This week crews started the installation of electrical power supplies for new signal equipment at Wellington, Sullivan, Chinatown and Community College Stations. This work will continue in the coming weeks.

  Please note: The schedule for these major infrastructure projects is dependent on weather and COVID-19 guidelines and subject to change without notice.

  For more information: Visit www.mbta.com/OLT to see the numerous projects that OLT is carrying out to improve your experience riding the Orange Line. To stay informed of service changes, sign up at www.mbta.com/alerts. If you have any questions, please email OLT@MBTA.com. To report OLT construction issues and noise complaints, please call the project hotline: 617-222-3393.