Report Highlights

Public Transit in the U.S.: Market Overview

The U.S. public transport market generated USD 58.6 billion in 2024 across fixed-route bus and rail services, paratransit, vehicle procurement and infrastructure. Public agencies dominate demand. The Federal Transit Administration (FTA) distributes capital and operating grants under 49 U.S.C. Chapter 53, while state sales taxes, dedicated local transit levies and farebox revenue fund the balance. Ridership has not returned to the roughly 9.9 billion unlinked trips recorded in 2019, which keeps operating budgets under pressure.

Private firms lead in vehicle manufacturing and service operation. New Flyer Industries and Gillig assemble most domestically built transit buses, while Siemens Mobility, Alstom and CAF USA supply rail rolling stock and signaling systems. Transdev and Keolis operate a large share of contracted bus and commuter services under management agreements. Agencies retain control of fare policy, route design and safety oversight, which keeps governance firmly public even where operations are outsourced.

Policy-Driven Growth in U.S. Public Transit

The Infrastructure Investment and Jobs Act (IIJA), Public Law 117-58, authorized $108 billion for public transportation over fiscal years 2022 through 2026. Its Bus and Bus Facilities Program and Low or No Emission Vehicle Program, both administered by the FTA, convert appropriations into fleet orders. Agencies win competitive grants and specify battery-electric or fuel-cell buses from manufacturers that meet domestic content rules, creating a direct pipeline from federal budget authority to vehicle contracts.

California's Innovative Clean Transit regulation, codified in Title 13 of the California Code of Regulations and enforced by the California Air Resources Board, requires transit operators to phase in zero-emission bus purchases, reaching 100 percent of new bus procurements by 2029. Meanwhile, Capital Investment Grants under 49 U.S.C. 5309 fund rail extensions through full funding grant agreements, with Phase 2 of New York City's Second Avenue Subway among the largest active commitments. Each grant converts federal matching shares into multi-year civil works and rolling stock contracts.

Regulatory Barriers and Compliance Costs

Buy America requirements under 49 U.S.C. 5323(j) and 49 CFR Part 661 require domestic manufacture of transit rolling stock, with a 70 percent domestic content threshold for buses and rail cars. The FTA enforces pre-award and post-delivery audits under 49 CFR Part 663, adding procurement delays of several months and separate inspection costs for every vehicle lot. Battery systems imported from Asia therefore face a compounded penalty when integrated into domestically assembled chassis.

Environmental review under the National Environmental Policy Act, with the FTA acting as lead agency, is the longest pre-construction barrier for new rail corridors. The Fiscal Responsibility Act of 2023 set a two-year deadline for environmental impact statements, yet Capital Investment Grant projects still commonly require five to eight years from project development to full funding grant agreement. Section 13(c) of the Federal Transit Act, codified at 49 U.S.C. 5333(b), also requires Department of Labor certification of transit worker protections before grant release, adding negotiation time.

Policy-Created Opportunities in U.S. Public Transit

The $2.5 billion Charging and Fueling Infrastructure grant program, created by the IIJA and administered by the Federal Highway Administration, funds depot and on-route chargers for battery-electric transit buses. Agencies that combine these awards with FTA Low-No allocations can finance full electric fleet conversions without drawing heavily on operating budgets. Electrical contractors and charging hardware suppliers with Buy America-compliant equipment gain the most direct procurement access.

Section 5310 Enhanced Mobility of Seniors and Individuals with Disabilities, codified at 49 U.S.C. 5310, provides formula funds to states and designated recipients for accessible paratransit vehicles. The Americans with Disabilities Act, implemented through 49 CFR Part 37, requires complementary paratransit within three-quarters of a mile of fixed routes, sustaining steady replacement demand for lift-equipped vans and cutaway buses. Demand-responsive software providers and vehicle integrators with ADA-compliant designs are the clearest beneficiaries.

Market at a Glance

Leading Market Participants

• New Flyer Industries
• Gillig
• BYD Motors
• Complete Coach Works
• Siemens Mobility
• Alstom
• Stadler US
• CAF USA
• Wabtec Corporation
• Transdev

Regulatory and Policy Environment

The primary legislation is the Infrastructure Investment and Jobs Act (Public Law 117-58), which amended the federal transit statutes codified at 49 U.S.C. Chapter 53 and is administered by the Federal Transit Administration within the U.S. Department of Transportation. Key compliance requirements include the Public Transportation Agency Safety Plan rule at 49 CFR Part 673, National Transit Database reporting under 49 U.S.C. 5335, drug and alcohol testing under 49 CFR Part 655, and Buy America certification under 49 CFR Part 661. Agencies that fail these obligations face withheld formula grants.

Surface transportation authorization under the IIJA expires September 30, 2026, and Congress must pass successor legislation before FY2027 apportionments, so the Senate Committee on Environment and Public Works and the House Committee on Transportation and Infrastructure will set the next funding framework. Compared with peers, the U.S. relies more heavily on discretionary grants and domestic content rules than the EU, where Directive (EU) 2019/1161 sets minimum clean-vehicle procurement targets for public bus tenders. Canada channels zero-emission bus funding through its Zero Emission Transit Fund, a more centralized model.

Long-Term Policy Outlook for U.S. Public Transit

Reauthorization will determine whether formula funding grows or flattens after 2026. The Congressional Budget Office has projected the Highway Trust Fund, which finances transit through its Mass Transit Account, to become insolvent in fiscal 2028, forcing either a general fund transfer or a fuel tax change. Reauthorization will tilt toward formula allocations rather than discretionary grants, favoring large metropolitan agencies with established state-of-good-repair backlogs.

By 2032, zero-emission bus procurement will extend beyond California as Buy America thresholds tighten under successor legislation, reshaping supplier economics for battery and hydrogen drivetrains. Aging heavy-rail fleets in New York, Chicago and Boston will drive replacement demand, favoring suppliers such as Alstom, Siemens Mobility and CAF USA that hold domestic assembly footprints.