Bus Electrification
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.
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:
Expanding our BEB fleet requires that we maintain safe and appropriate working conditions during and after construction, and provide the required electrical infrastructure and charging technology at our bus facilities to maintain a larger fleet. All nine of our facilities must be upgraded or replaced, and building each facility takes years to plan, design, and construct. Any delays in receiving the funding for modernizing our bus facilities could also delay electrification of our fleet.
As new facilities are completed under the Bus Facility Modernization program, we'll build in extra capacity to use as "swing space" to temporarily house buses from other facilities during construction and renovation. We'll build these facilities in phases over multiple decades.
During this time, our fleet will continue to age, so we’ll need to purchase enhanced electric hybrids (EEHs)—which combine diesel and electric power—if our facilities cannot yet accommodate fully electric BEBs.
We will partner with municipalities and local utility companies to implement new charging technology across our bus network.
Through these partnerships, we'll also need to map out where and how buses will charge along each route. Some buses run longer on a single charge and will charge at depots, while others will charge en route.
Until new facilities are ready, we'll need to purchase enhanced electric hybrids (EEHs) to replace our oldest buses. As new facilities open, we can buy more BEBs.
Integrating BEBs into our operations will require large-scale changes to bus operations to ensure that buses are fully charged and reliable. We'll start with routes that are better suited to BEB conversion because of length and geography (topography), and whose schedules allow us to charge buses sufficiently without service interruptions.
We'll improve the process as we learn throughout the project by continuously assessing the performance of new buses and facilities. Evaluation methods and challenges will include the following:
- Testing BEB technology in cold weather to identify potential performance issues and solutions, such as outfitting buses with auxiliary heaters to retain battery range
- Monitoring changes in the rapidly evolving bus market and determining how they affect our plan
- Evaluating ways to implement charging and backup plans for use during facility power outages
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:
Project | Definition | Status | |||
---|---|---|---|---|---|
Project | Silver Line BEB Pilot | Definition | A fleet of five 60-foot BEBs purchased in 2019 is teaching us more about the technology | Status | In progress |
Project | Fleet State of Good Repair | Definition | A strategic purchasing plan to replace our oldest buses first to maintain safe and reliable service | Status | In progress |
Project | Quincy Bus Facility | Definition | An all-new facility that can accommodate BEBs and expand system capacity | Status | In construction |
Project | Arborway Bus Facility | Definition | An all-new facility that can accommodate BEBs and expand system capacity | Status | In design |
Project | North Cambridge Route Conversion | Definition | Conversion of the North Cambridge Bus Maintenance Facility (Routes 71 and 73) from electric trolleybuses to BEBs—this will improve reliability, flexibility, and operations | Status | In construction |
Project | New Technology Testing | Definition | Ongoing tests to evaluate how we can integrate these vehicles into BEB-ready facilities | Status | In progress |
Past Events
Downloads
Presentations to the Board
- MBTA Bus Fleet and Facility Update (April 26, 2021)
- Modernizing Our Bus Fleet and Facilities (November 9, 2020)
- Battery Electric Bus Performance (September 14, 2020)
Resources
MBTA Bus Electrification Plan (May 2022)
Key Takeaways of the Cost-Benefit Analysis for Trolley Buses and BEBs (December 6, 2021)
MBTA Approach to Overcoming Winter Range Challenges with Battery Electric Buses (September 30, 2021)
MBTA Bus Electrification: Emissions Reductions Analysis (Spring 2021)
Contact Us
For other questions and comments related to bus electrification, please contact engineering@MBTA.com.
Related Projects
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.