The GREEN Streets Act amends Title 23 and related transit statutes to require transportation planners and States to account for greenhouse gas emissions, per‑capita vehicle‑miles‑traveled (VMT), resilience, and transit accessibility when setting performance measures and approving projects. It creates new national standards, requires specific pre‑approval analyses for projects that add traffic capacity, and attaches funding obligations to states that miss targets.
For practitioners, the bill shifts the criteria used to prioritize federal‑aid projects: capacity expansion must clear new analytic and cost‑effectiveness hurdles, transit and active‑transport projects gain explicit standing as compliance options, and formula dollars can be redirected to projects that help states meet climate and accessibility goals. Agencies, MPOs, and state DOTs will need new data, benefit‑cost frameworks, and public documentation routines to comply.
At a Glance
What It Does
The bill adds “combating climate change” to national performance goals, directs DOT to set minimum standards (including decreasing per‑capita VMT and improving resilience), and requires states and MPOs to analyze and publicly document the GHG, VMT, multimodal, and environmental‑justice impacts of projects that increase traffic capacity. It also creates transit‑accessibility metrics and ties funding obligations to missed targets.
Who It Affects
State Departments of Transportation, metropolitan planning organizations (MPOs), public transit agencies, recipients of federal‑aid highway funds, and federal agencies (DOT and EPA via consultation) are directly affected. Project sponsors proposing capacity expansions and entities applying formula funds will see new procedural and documentation requirements.
Why It Matters
The bill moves federal performance measurement from traditional safety/condition metrics toward climate and accessibility objectives and creates a funding lever to steer capital toward transit, active mobility, and land‑use strategies. Practically, it alters project prioritization and could change where federal formula money flows.
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What This Bill Actually Does
The GREEN Streets Act rewrites parts of Title 23 and related transit law to make greenhouse‑gas reduction, reduced VMT, resilience, and transit access explicit goals of federal transportation performance planning. It inserts “combating climate change” into the list of national performance objectives and directs the Secretary of Transportation, working with EPA, to set minimum standards and measures for public roads that include per‑capita VMT reductions, resilience benchmarks, and metrics to track carbon dioxide and other pollutants.
For projects that add traffic capacity, the bill establishes a two‑track planning and approval regime. It defines a “covered project” broadly (adding travel lanes, converting shoulders, or any project projected to receive significant federal funds) and requires MPOs and States to analyze the expected impacts on per‑capita VMT, mobile source GHGs, and non‑single‑occupancy‑vehicle trips before approval.
The analysis must also assess air pollution and other environmental‑justice indicators for affected communities using federal screening tools. This means capacity projects must show their net mobility and environmental effects up front.Before approving new single‑occupancy vehicle capacity, an MPO or State must publicly file documents demonstrating progress toward a state of good repair on the National Highway System, show via benefit‑cost analysis that the capacity project is more cost‑effective than alternatives (operational fixes, eligible transit projects, or freight‑focused non‑SOV projects), and present a public maintenance and operations plan for the new asset.
Those requirements create a clear analytical preference for lower‑carbon and multimodal alternatives unless the capacity expansion can pass those comparators.To enforce the new performance emphasis, the bill ties formula obligations to results: States that miss established targets must obligate a required share of federal formula apportionments to projects that advance the targets (explicitly including transit, active transportation, micromobility, land‑use projects, and intercity passenger service). The share grows if targets continue to be missed.
Separately, the bill creates national transit‑accessibility standards (transit accessibility, stop distance, mode share, first/last‑mile, and disability accessibility) for metropolitan areas above a population threshold and requires covered entities to set targets, report, and receive DOT technical assistance. The Secretary must also provide assistance to noncovered entities, but does not impose the same reporting duties on them.
The Five Things You Need to Know
The bill adds a new national performance goal—“Combating climate change”—to 23 U.S.C. §150 and requires DOT to set minimum standards for decreasing per‑capita VMT and improving resilience.
A “covered project” that adds capacity (including adding lanes or converting shoulders) or that is projected to receive substantial federal funds must undergo a pre‑approval analysis of effects on per‑capita VMT, mobile source GHGs, non‑SOV trips, and environmental‑justice metrics.
Before building new single‑occupancy‑vehicle capacity, an MPO or State must show progress on a state of good repair, demonstrate via benefit‑cost analysis that the new capacity is more cost‑effective than operational fixes, eligible transit projects, or non‑SOV freight projects, and publish a maintenance plan.
If a State misses targets tied to the Secretary’s public‑road standards, the State must obligate a set share of its formula apportionments to projects that achieve the targets (including transit, active‑transportation, micromobility, and land‑use projects); the obligation share increases by 2 percentage points each year the State continues to miss targets.
The bill creates new transit‑accessibility metrics and requires metropolitan areas with populations of 250,000+ (and the States containing them) to set targets, submit an initial report, and then provide periodic follow‑up reports with DOT technical assistance.
Section-by-Section Breakdown
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Adds climate and road‑level performance measures
This amendment inserts “Combating climate change” into the statutory list of national performance goals and requires the Secretary to promulgate standards for public roads that include decreasing per‑capita VMT, improving resilience, and measuring carbon dioxide, other greenhouse gases, and multipollutants (including noise). The practical effect is that State performance targets must be set against these new metrics and updated rulemaking is required so States can align reporting and targets.
Pre‑approval analysis for projects that increase traffic capacity
The bill requires MPOs and States to conduct and publish analyses for covered projects that increase traffic capacity. Covered projects are defined by function (adding lanes or converting shoulders) or by funding threshold. Analyses must estimate impacts on per‑capita VMT, mobile‑source GHGs, and non‑SOV trips and must assess pollution and EJ metrics for affected communities using Federal tools. The provision also inserts climate and VMT reduction goals into metropolitan and statewide planning purposes.
Procedural gates before new single‑occupancy vehicle capacity
Before carrying out new single‑occupancy capacity projects, MPOs/States must submit documentation showing (1) progress toward a state of good repair on the National Highway System, (2) that the project supports State performance targets and is more cost‑effective on a benefit‑cost basis than operational improvements, eligible transit capital, or non‑SOV freight projects, and (3) a public plan for maintaining and operating the new asset. These requirements change project selection by forcing direct comparison with multimodal options.
Funding obligations tied to missed targets
This section conditions portions of State formula obligations on performance. If a State reports failure to meet targets tied to the Secretary’s minimum public‑road standards, the State must obligate a specified share of its 104(b)(1) and 104(b)(2) apportionments to projects that advance those targets. The required share grows each fiscal year the targets are missed. The statute lists eligible project types—transit, transit service improvements, active transportation, micromobility, and land‑use projects—giving DOT a funding instrument to redirect formula dollars toward lower‑carbon investments.
Transit asset management expanded to require accessibility standards
The bill expands the transit asset management statute to add transit accessibility and related metrics (transit accessibility, stop distance, transit mode share, first/last‑mile, and disability accessibility). It defines covered entities (metropolitan areas of 250,000+ and their States), requires DOT to set national standards within a year, and requires covered entities to set targets and submit an initial report within 180 days of the standards. This creates a parallel performance track for accessibility alongside existing asset targets.
Reporting, technical assistance, and statutory clean‑up
The bill requires periodic follow‑up reports, directs DOT to provide technical assistance and analytical tools to covered entities, and mandates assistance to noncovered entities (rural and Tribal) without imposing the same reporting obligations. It also makes a set of technical conforming edits across Title 23 and Title 49 to align cross‑references to the newly renumbered or expanded transit‑access provisions.
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Explore Transportation in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Riders and residents in metropolitan areas where transit accessibility targets lead to more and better transit, shorter transit‑stop distances, and investments in first/last‑mile connections — because the law elevates transit as an explicit compliance option.
- Environmental justice communities that will receive mandated pollution and EJ screening for covered projects, improving visibility of localized air quality and other harms during project review.
- Transit agencies, active‑transportation providers, micromobility operators, and intercity passenger‑rail sponsors — because the statute lists these project types as eligible remedies for missed targets and supports technical assistance.
- Planners and local governments that pursue compact land‑use and multimodal projects — they gain a stronger federal policy rationale and a potential source of redirected formula funding when States fail to meet performance targets.
Who Bears the Cost
- State Departments of Transportation and metropolitan planning organizations — they must expand modeling, environmental‑justice screening, benefit‑cost analyses, documentation, and public reporting capacity to meet the new analytical and procedural gates.
- Traditional highway project sponsors and contractors — projects that add single‑occupancy capacity face higher pre‑approval hurdles and more direct comparison with multimodal alternatives, increasing the risk that some projects will be delayed, reduced in scope, or replaced.
- State budgets and program flexibility — states that miss targets will see portions of formula apportionments effectively earmarked for specific project types, reducing discretionary use of 104(b)(1) and 104(b)(2) funds for other priorities.
- Federal agencies (DOT, FHWA) — they will face increased responsibilities for rulemaking, target review, technical assistance, and determinations about whether a State has met targets, creating administrative and enforcement costs not accompanied by dedicated new funding in the bill text.
Key Issues
The Core Tension
The central dilemma is between using federal planning and funding law to accelerate decarbonization and accessibility, versus preserving state and local control over transportation priorities and short‑term mobility needs: the bill forces a choice—either redirect public investment toward transit, active modes, and land‑use change to meet climate and access targets, or accept recurring formula constraints and greater federal oversight when targets are missed.
The bill creates concrete policy levers but leaves several implementation details open and operationally difficult. Measuring per‑capita VMT and mobile‑source GHGs at project and statewide scales requires harmonized models, consistent baseline years, and treatment of induced demand—issues that routinely drive controversy.
The statute requires benefit‑cost comparisons between capacity builds and alternatives, but it does not prescribe standardized inputs or discounting conventions; without tight guidance, jurisdictions could produce divergent BCAs that are difficult for DOT to compare or second‑guess. Similarly, the funding obligation is triggered by a Secretary determination that targets were not achieved; the underlying process for that determination (data thresholds, crediting for local actions, and how to count transient performance changes) will shape whether the funding lever is effective or simply generates compliance paperwork.
The bill’s equity and enforcement trade‑offs are notable. Requiring EJ screening exposes disproportionate impacts to public view, but the statute does not create a direct remedy beyond shaping project selection and funding incentives; communities may still lack standing to stop projects.
The $25 million or lane‑addition definitions that sweep projects into “covered” status could capture many urban corridor projects while excluding smaller but cumulatively significant work in rural areas. Finally, the administrative burden on smaller MPOs and State DOTs—especially where DOT must provide technical assistance—may be large relative to available resources, risking uneven implementation and political pushback by jurisdictions with limited analytic capacity.
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