GREEN Streets Act
- Sponsor
- Sen. Markey, Edward J. [D-MA]
- Committees
- Environment and Public Works Committee (primary)
- Last action
- Sep 18, 2025
Bottom line
The GREEN Streets Act mandates federal climate and transit accessibility goals into state and metropolitan transportation planning, shifting investment priorities and imposing financial consequences for non-compliance.
What it actually does
This bill amends federal transportation law to require state and metropolitan transportation planners to prioritize projects and strategies that reduce greenhouse gas emissions and decrease per capita vehicle miles traveled (VMT). It establishes new performance standards for states related to climate change and transit accessibility, imposing conditional funding obligations on states that fail to meet these targets. Additionally, it mandates detailed analyses for major road capacity expansion projects, particularly concerning their environmental justice impacts and VMT effects.
Proponents argue
Supporters argue that the bill is a crucial step towards combating climate change by integrating greenhouse gas reduction and VMT decrease into core transportation planning. They contend it will foster more sustainable, resilient, and equitable transportation systems, enhance public health by reducing air and noise pollution, and improve access to essential services through better public transit and active transportation options, especially benefiting environmental justice communities.
Opponents contend
Critics might argue that the bill represents federal overreach into state and local transportation decision-making, imposing burdensome mandates and potentially diverting funds from essential road maintenance and capacity projects. Concerns could be raised about the administrative costs for new analyses, the feasibility of achieving aggressive VMT and GHG reduction targets in diverse geographic areas, and the potential for federal penalties to disrupt state transportation programs.
The bill is moderately complex due to its amendments to existing code and new definitions, requiring a careful read to understand its full implications.
Section 2, amending 23 U.S.C. 150(b) and (c)
New National Performance Goal and Standards for Public Roads
This provision adds 'Combating climate change' as a national performance goal for federal-aid highways, specifically aiming to reduce greenhouse gas emissions and improve transportation system resilience. It directs the Secretary of Transportation to establish minimum standards for states to decrease per capita vehicle miles traveled (VMT), improve road resilience, and achieve net-zero greenhouse gas emissions on public roads. States will also be required to assess carbon dioxide, air pollutants, noise pollution, and other greenhouse gas emissions.
Supporters argue
Proponents argue that explicitly integrating climate change into national transportation goals is essential for addressing the climate crisis, promoting sustainable infrastructure, and ensuring the long-term resilience of transportation systems against extreme weather events.
Critics contend
Opponents might contend that these new mandates could lead to federal overreach, potentially diverting resources from traditional infrastructure needs like road maintenance and expansion, and imposing unrealistic targets on states with diverse transportation challenges.
Tradeoffs
The provision balances the urgent need for climate action with the existing demands for maintaining and expanding traditional transportation infrastructure. It creates a tension between federal climate mandates and state-level flexibility in transportation planning.
Section 3, amending 23 U.S.C. 134(h) and 135(d), and 49 U.S.C. 5303(h) and 5304(d)
Analysis and Requirements for Road Capacity Expansion Projects
This section requires Metropolitan Planning Organizations (MPOs) and State DOTs to conduct and publish detailed analyses for 'covered projects'—those increasing traffic capacity or receiving at least $25 million in federal funds. These analyses must assess the impact on per capita VMT, mobile source greenhouse gas emissions, non-single-occupancy vehicle trips, and environmental justice metrics (like air pollution) in environmental justice communities. Furthermore, before constructing new single-occupancy vehicle capacity, MPOs and states must demonstrate progress on existing infrastructure repair, show the project is more cost-effective than alternatives (like transit or operational improvements), and have a public plan for maintaining the new asset.
Section 4, amending 23 U.S.C. 119(f)
Conditional Funding for Greenhouse Gas Emissions on Public Roads
This provision establishes a conditional funding mechanism: if a state fails to achieve its performance targets for greenhouse gas emission reduction and VMT decrease on public roads, it will be required to obligate a portion of its federal highway funds (33% of section 104(b)(1) funds and 10% of section 104(b)(2) funds, excluding suballocated amounts) towards specific climate-friendly projects in the following fiscal year. The required obligation from 104(b)(1) funds increases by 2% each subsequent year the state remains non-compliant. Eligible projects include transit expansion, active transportation infrastructure, micromobility, and land use projects that increase density or support transit-oriented development.
Section 5, amending 49 U.S.C. 5326
National Transit Access Standards and Performance Measures
This section renames 49 U.S.C. 5326 to include 'accessibility' and introduces new definitions for 'covered entity' (MPOs/States with populations >= 250,000), 'first last mile accessibility,' 'transit accessibility,' 'transit mode share,' and 'transit stop distance.' It mandates the Secretary of Transportation to establish national standards and performance measures for these new definitions, as well as for accessibility for individuals with disabilities. Covered entities are then required to establish targets for these measures and submit reports on their performance and existing infrastructure (sidewalks, crosswalks, bike lanes).
The definition of 'covered project' for which MPOs and States must conduct detailed analyses. It includes projects that increase traffic capacity (e.g., adding new travel lanes, converting shoulder lanes) OR projects projected to receive not less than $25,000,000 of Federal funds.
Section 3(a)(4)(A)(i) and 3(b)(4)(A)(i)
Why it matters:This is standard legislative practice for defining terms that apply to a specific section. However, its broad financial threshold means many projects not explicitly focused on 'capacity' will still trigger the analysis requirements, which could be a significant expansion of regulatory scope.
Case for: Supporters argue that including projects with substantial federal funding ensures that all significant investments are subject to environmental and VMT impact scrutiny, regardless of their stated primary purpose, promoting accountability and sustainable development.
Case against: Critics might argue that the $25 million threshold is too low and could ensnare a wide range of projects not primarily intended for traffic capacity expansion, imposing undue analytical burdens and delays on projects that may have minimal VMT or GHG impacts.
Estimated impact: Significantly expands the number and type of projects requiring detailed environmental and VMT analysis, affecting potentially hundreds of projects annually across states and MPOs.
The provision that increases the funding obligation for states failing to meet greenhouse gas emission targets by 2 percent each subsequent fiscal year of non-compliance.
Section 4(A)(ii)
Why it matters:This is a standard legislative technique to escalate penalties for persistent non-compliance. While technically phrased, its long-term financial implications are significant and could be easily missed by a casual reader.
Case for: Proponents argue that this escalating penalty provides a stronger, continuous incentive for states to prioritize and achieve their climate targets, ensuring that non-compliance is not a sustainable option.
Case against: Opponents might argue that this escalating penalty could severely strain state transportation budgets over time, particularly for states facing significant challenges in meeting targets, potentially leading to a disproportionate impact on their overall infrastructure programs.
Estimated impact: Could lead to substantial and increasing diversions of federal highway funds within a state's budget if climate targets are not met over multiple years.