Sustainability Bonds

The Framework, which is consistent with the Sustainability Bond Guidelines (“SBG”) established by the International Capital Market Association, evaluates the environmental and social benefits provided by the projects.

Environmental considerations include the transition to a low-carbon, climate resilient, and sustainable community.

Social considerations include access to essential services and affordable infrastructure, critical health and safety improvements, and socioeconomic advancement.

• Respect, protect, and improve the built environment and enhance the quality of the travel experience
• Reduce emissions from personal vehicle trips by increasing capacity to carry passengers and increasing the attractiveness of public transit by offering more frequent, reliable, and comfortable service
• Address climate change by reducing carbon emissions and building resiliency in the system to prepare for the potential impacts of climate change and extreme weather
• Respect, enhance, and protect the natural environment and its contribution to the quality of life
• Control operations to minimize transport related noise and vibration
• Proactively manage activities to minimize and control pollution
• Wisely manage resources to reduce waste and protect the natural environment

• Balance the means of customers, particularly low-income riders, by building affordability into our system
• Operate an inclusive system and facilities designed to accommodate a diverse customer base that is fully accessible to all customers
• Ensure communities within the service area have available, reasonable, and equitable reach of the public transportation system
• Offset social and environmental burdens experienced by populations or communities within the service area
• Address equity across the diverse modes, customer bases, and service area
• Operate our system by addressing safety standards that protect passengers, operators, and the general public
• Maintain a safe, empowering, and satisfying workplace environment for MBTA and affiliated employees

2023 Sustainability Bond Progress Report (PDF, 501 KB)

2022 Sustainability Bond Progress Report (PDF, 1.5 MB)

2021 Sustainability Bond Progress Report (PDF, 1.7 MB)

2020 Sustainability Bond Progress Report (PDF, 1.6 MB)

2019 Sustainability Bond Progress Report (PDF, 2.2 MB)

2018 Sustainability Bond Progress Report (PDF, 1 MB)

2020 Series B (Subordinated) (PDF, 2.6 MB)

2017 Series A1 and A2 (Subordinated) (PDF, 1.3 MB)

2017 Bond Anticipation Notes (Subordinated) (PDF, 1.4 MB)