The "Complete Streets Act of 2025" requires each State to establish a comprehensive program for developing "complete streets," which are public roads designed to provide safe and accessible options for multiple travel modes and users of all ages and abilities. States must establish these programs and begin providing grants for complete streets design and construction within two to three fiscal years of the Act's enactment. The program's goals include offering technical assistance, incentivizing complete streets policies, addressing critical infrastructure gaps, and ensuring equitable service for underserved communities. The Secretary of Transportation is tasked with developing benchmarks and guidance for States and eligible entities to effectively implement complete streets programs and policies. To receive federal funding, eligible entities, such as local governments or metropolitan planning organizations, must adopt a complete streets policy approved by their State or a metropolitan planning organization. These policies must detail how complete streets infrastructure will be developed, how all users will be served, and how the policy applies to all project phases, while also outlining specific exemption requirements. Furthermore, eligible entities seeking grants must develop a "complete streets prioritization plan," which is a comprehensive strategy and list of specific projects to design and implement complete streets. These plans must align with local infrastructure plans and prioritize projects based on improvements to safety, mobility, accessibility, and equitable access for low-income individuals and communities of color. Grants for these projects are capped at $20,000,000 or 20 percent of the State's complete streets program funding, with priority given to projects in areas where non-motorized users are most vulnerable. The bill also mandates the Secretary of Transportation to establish complete streets design standards within 180 days, including requirements for dedicated bike lanes, sidewalks, crosswalks, lighting, and signalization. These standards will apply to new construction or reconstruction projects on Federal-aid highways, with phased implementation beginning two to five years after enactment, though certain projects like limited access highways are exempt. Additionally, the Secretary and the Attorney General must update accessibility regulations to adopt new guidelines for pedestrian facilities in the public right-of-way, incorporating provisions for various disabilities. To fund these initiatives, each State is required to obligate 5 percent of specific federal highway funds to carry out its complete streets program annually. The legislation also amends the FAST Act to mandate that States and metropolitan planning organizations adopt and implement design standards for federal surface transportation projects that safely accommodate all users. States will also be required to submit regular reports and inventories detailing their progress and compliance with these new complete streets design standards.