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Bus Electrification

A Silver Line Battery Electric Bus (BEB) with an example of en-route charging equipment.
A Silver Line battery electric bus (BEB) with a demonstration of en-route charging equipment

To reduce our carbon footprint, we’re converting our bus fleet to zero-emissions vehicles over the next several decades. This aligns with our policy of managing our energy resources efficiently and responsibly. 

Our commitment to building a more sustainable transit system will require significant time and financial investment. This is our plan to modernize our bus fleet:

  • Replace our nine bus maintenance facilities to accommodate BEBs and related charging infrastructure 
  • Build these expanded and modernized facilities at the rate of one every two to three years 
  • Integrate charging stations throughout our bus network 
  • Invest $100 million annually (as facilities become ready) to build our fleet of BEBs 

As an initiative of the Better Bus Project, this program meets the following goals:

  • Reduced carbon footprint: BEBs reduce greenhouse gas (GHG) emissions and help mitigate the MBTA's carbon footprint
  • Equity: Investing in our bus facilities and fleet ensures improved transit access for our riders, especially along some of our busiest routes
  • Service flexibility: Upgraded facilities expand service capacity to allow for more frequent departures
  • Service reliability: Modernized work environments for maintenance staff and updated buses bring our fleet and facilities to a State of Good Repair—this reduces maintenance costs and supports safety and reliability

Building a Better T

As part of our $9.6 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.

Learn more

Our Plan for a Zero-Emissions Fleet

Our goal is to transition to a zero-emissions fleet that improves service flexibility, capacity, and equity over the next several decades. This will require changes to the system as a whole, and must be coordinated to avoid disruptions to service.

Our strategy targets three project focus areas. Each of these areas presents a unique set of challenges and potential solutions:

What We’re Doing Now

We’re taking a phased approach to purchasing additional vehicles and upgrading the facilities that will support BEBs.

Currently, we’re evaluating opportunities and planning projects that move us more quickly toward a zero-emissions future:

ProjectDefinitionStatus
ProjectSilver Line BEB PilotDefinitionA fleet of five 60-foot BEBs purchased in 2019 is teaching us more about the technologyStatusIn progress
ProjectFleet State of Good RepairDefinitionA strategic purchasing plan to replace our oldest buses first to maintain safe and reliable serviceStatusIn progress
ProjectQuincy Bus FacilityDefinitionAn all-new facility that can accommodate BEBs and expand system capacityStatusIn construction
ProjectArborway Bus FacilityDefinitionAn all-new facility that can accommodate BEBs and expand system capacityStatusIn design
ProjectNorth Cambridge Route ConversionDefinitionConversion of the North Cambridge Bus Maintenance Facility (Routes 71 and 73) from electric trolleybuses to BEBs—this will improve reliability, flexibility, and operationsStatusIn construction
ProjectNew Technology TestingDefinitionOngoing tests to evaluate how we can integrate these vehicles into BEB-ready facilitiesStatusIn progress

Past Events

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Contact Us

For other questions and comments related to bus electrification, please contact engineering@MBTA.com.

Related Projects

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Building a Better T

As part of our $9.6 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.

Learn more

Related Projects

View all projects