Primary affected parties:

• Local governments and transit agencies: These entities will be the most directly affected because they apply for and receive federal transportation grants. Projects that planned to use the covered federal funds for streetcar acquisition, operation, or upkeep will no longer be eligible for that federal support and must identify alternative funding (state/local budgets, bonds, private partnerships) or cancel/scale back plans.

• Transportation sector and contractors: Companies that manufacture streetcars, provide maintenance services, or hold contracts to operate streetcar services could lose potential business where projects relied on the affected federal grants.

• Commuters and local residents: Riders and residents in cities planning streetcar lines could experience delayed or canceled projects, which may reduce transit options and potential benefits like expanded mobility or economic development tied to streetcar corridors.

• Federal grant-making agencies: Agencies administering the four programs will need to revise guidance, application processes, and monitoring/audit procedures to ensure compliance with the new ineligibility rules, which will impose administrative work but not new appropriations.

Broader effects:

• Financial shifts: The prohibition increases the funding burden on state and local governments or private partners for streetcar projects, potentially making some projects infeasible or prompting design changes (e.g., switching to bus-based alternatives).

• Project planning and legal risk: Entities that already entered into contracts expecting federal support may face budget shortfalls and potential contractual disputes; planners will need to reassess project financing and timelines.

• Policy trade-offs: The change narrows the types of transit infrastructure supported by the specified federal programs, which could influence local choices between transit modes (favoring modes still eligible for federal support).