Transit and Ground Passenger Transportation (United States) — NAICS 485

An investor's primer (subsector rollup). NAICS is the North American Industry Classification System, the U.S. federal standard for grouping businesses by activity. Code 485 is a subsector (the three-digit level) inside Sector 48–49, Transportation and Warehousing. It gathers six four-digit industry groups — everything that moves people over the ground on local and regional trips: city subways and buses, intercity coaches, taxis and rideshare, limousines, school buses, charter motorcoaches, and the "everything-else" bin of paratransit and shuttles. This page synthesizes the six child primers and our ground-truth federal figures for the 485 level; for the deep detail on any one business, read its child primer.

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1. Overview

NAICS 485 is the ground-passenger-transportation economy: how Americans get around without owning the trip end to end — the everyday services that carry people to work, to school, to the doctor, to the airport, and between cities. It spans six very different businesses, and the single most useful thing to understand at this level is that they barely resemble one another as investments, even though they share a common physical core (a vehicle, a driver, and a schedule or a dispatch).

Three facts govern the whole subsector:

1. It is mostly not investable as public stock. Of the six children, only one — taxi and ridesharing — contains large U.S.-listed pure-plays (Uber and Lyft). The rest are government-owned (urban transit), privately held (intercity bus, charter, most paratransit), or owned by infrastructure, pension, and private-equity funds (school bus). Public-market money reaches most of this subsector only indirectly, through equipment makers, foreign-listed operators, listed asset managers, or municipal bonds. [1][3][4][5][6]

2. The official figures drastically undercount it. U.S. business statistics count only private, for-profit employer firms. This subsector is unusually full of the two things those surveys miss: government operations (most subways, much school busing, much paratransit) and independent contractors and owner-operators (rideshare drivers, single-van businesses). The measured ~$50.9 billion of private receipts (Section 3) sits beneath a real activity several times larger. [1][6][7][8]

3. It is a labor-and-safety business, not a capital-markets one. Across all six children the dominant cost is driver wages, the fastest-rising cost is insurance, and the binding constraint is finding and keeping drivers. Standard equity frameworks built for other sectors — regulated-utility rate base, real-estate funds-from-operations, mining cost curves — do not apply here. You judge these businesses on utilization, contract terms, subsidy dependence, and cost discipline. [3][4][5][6]

The distinctive value of reading the subsector as a whole is the contrast across the six children — which is where the money is, which is public versus private, and which way each is heading. That is Section 2.

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2. What's inside — the six children and how they differ

NAICS 485 contains exactly six industry groups. Their federal receipts sum cleanly to the subsector total, so 485 is a true rollup, not an approximation. Ordered below by share of the subsector's private receipts (largest first). [1][2][3][4][5][6][7]

¹ CR4 = the "four-firm concentration ratio," the share of an industry's receipts held by its four largest firms. AV = autonomous vehicle (self-driving car). NEMT = non-emergency medical transportation. PE = private equity. 1099 refers to the U.S. tax form for independent contractors, who are not counted as payroll "employees."

Two contrasts carry the whole subsector:

• The revenue-versus-headcount inversion. School buses (4854) employ nearly half the subsector's counted workers but earn under a quarter of its receipts — a genuinely labor-heavy, low-wage contract business. Taxi & limousine (4853) is the mirror image: the biggest revenue slice but only 11% of counted employees, because the millions who drive for Uber and Lyft are independent contractors who do not appear in payroll statistics. Count the drivers and the labor picture flips. [3][4]

• The ownership spread. Read the "Who owns it" column top to bottom and you have almost the entire menu of how assets are held in America — public stock (rideshare), public government (transit), infrastructure and pension funds (school bus), private equity (charter, NEMT), family businesses (charter, intercity), and foreign parents (Greyhound, Kelsian's U.S. arm). This one subsector is a tour of ownership structures, and only a sliver of it trades on a U.S. exchange. [1][2][3][4][5][6]

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3. How big it is (this level's rollup figures)

Our ground-truth federal figures for NAICS 485. The U.S. Census Bureau's County Business Patterns (CBP, an annual count of private employer establishments) and 2022 Economic Census (a five-year count of private firms and their revenue) report — for the private, for-profit sector only: [7]

(The HHI — a finer concentration gauge running to 10,000 for a monopoly — is withheld for confidentiality in the federal file for this subsector, so we do not report or infer it. Receipts and payroll come from different survey years and should not be read as one income statement.)

These are a clean rollup of the children. Child receipts, establishments, employees, and payroll each sum to the subsector totals above; only the firm count is slightly de-duplicated at the parent (the six children list ~16,650 firms, versus 16,527 here, because ~123 firms operate across more than one child). [1][2][3][4][5][6][7]

Why this drastically undercounts the real subsector — for two compounding reasons. Business surveys miss both of the things this subsector is full of:

1. Government operations are out of scope. CBP and the Economic Census exclude government-owned establishments. Since most subway/heavy-rail and integrated transit is public, most school busing is run in-house by districts, and much paratransit is operated by public transit agencies, huge blocks of real activity never appear. By transit-specific data, U.S. public transportation alone is roughly a $93 billion activity employing more than 430,000 people; total student transportation (public plus contracted) is about $27–28 billion; and U.S. non-emergency medical transportation is estimated at $11–17 billion — each far larger than the census slice of its child. [1][4][6][9]
2. Contractors and owner-operators are invisible. Rideshare's driving workforce is 1099 labor, excluded from the 458,871 employees and $18.50B payroll; sole-proprietor cab drivers, chauffeurs, and single-van businesses are "nonemployer" firms counted in a separate program; and platform receipts largely reflect the companies' net take, not the gross fares riders pay. [3][6][8]

Treat the ~$50.9 billion and 458,871 employees as a floor for the private, employer slice, not the size of ground passenger transportation. The true economic footprint is comfortably several times larger. [7][8]

What the blended concentration means. The subsector's CR4 of 30.7% looks "unconcentrated" (well below the ~1,500 HHI the U.S. Department of Justice and Federal Trade Commission call moderately concentrated), but that number is misleading in two directions. It blends a genuine duopoly inside rideshare (CR4 ~85% within 48531) with atomized limo, charter, and paratransit markets (CR4 12–16%). And it describes only the private residue — it says nothing about the public transit agencies, each of which is a local monopoly. Concentration here is national-fragmentation-over-local-monopoly, not real competition. [1][3][5][6][7]

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4. Investable universe — where value concentrates across the children

The defining feature of NAICS 485 for a public-market investor: almost none of it is buyable as a U.S.-listed pure-play, and what is buyable sits almost entirely inside one child. Value, ownership, and liquidity concentrate very differently from receipts. [3][4][6]

• The only large public pure-plays are in rideshare (4853). Uber (NYSE: UBER) — a diversified global platform (Mobility, Delivery, Freight) — and Lyft (Nasdaq: LYFT) — a near-pure U.S./Canada rideshare bet — are the whole of the subsector's clean public equity. Self-driving optionality runs through Alphabet (Waymo), Tesla (Robotaxi), and Amazon (Zoox), where mobility is a small line in a giant. [3]
• Everything else is reached indirectly. Across the five other children, exposure comes through:
• Equipment and technology makers — rail (Wabtec, Alstom, Siemens, Knorr-Bremse), buses and coaches (NFI Group, REV Group, Blue Bird), fare and safety technology (Conduent, Verra Mobility). Diligence the transit-segment revenue and order backlog, not headline group sales. [1][4][5]
• Foreign-listed operators — Mobico Group (LSE: MCG), Kelsian Group (ASX: KLS), ComfortDelGro (SGX: C52) each run U.S. contract, charter, or intercity operations, but bundle them with much larger overseas businesses. [1][2][5][6]
• Listed asset managers — EQT AB (Stockholm), which owns First Student inside its infrastructure funds — a thin, indirect sliver of the school-bus child. [4]
• Municipal bonds — the most direct claim on the government-run transit child (4851): tax-exempt transportation-revenue and general-obligation bonds issued by agencies such as the MTA, reached via muni-bond funds or direct purchase. [1]
• The real owners are private and institutional. The scaled operating assets of this subsector are held off-market: infrastructure, pension, and PE funds (EQT, CDPQ, I Squared, Audax in school bus; PE roll-ups in charter and NEMT), NEMT brokers (ModivCare, privately held MTM), global contract operators (Transdev, Keolis, RATP Dev, MV Transportation), and thousands of family firms and owner-operators in charter, limo, intercity, and paratransit. Access is through the funds, direct acquisition, or private credit — not a ticker. [1][4][5][6]

Bottom line for the universe: receipts are led by rideshare and school bus, but public liquidity is almost all rideshare; institutional ownership dominates school bus and paratransit; and government/muni is the only clean claim on urban transit. Match your vehicle to the child, not to the subsector.

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5. How the money works

There is no single business model here — the subsector runs on five distinct profit engines, and telling them apart is most of the analytical work. None of the specialized valuation frameworks from other sectors apply; judge each on its own metric. [1][3][4][5][6]

• The public-service / subsidy model (urban transit, 4851). The owner is a government, not a profit-seeker. Systems run on fares plus dedicated local taxes and state and federal grants; the farebox recovery ratio (share of operating cost covered by fares) has fallen to roughly 13–17 cents on the dollar since the pandemic, and federal money skews to capital, not operations. Private profit exists only in the thin purchased-transportation layer, where an agency contracts a private firm to run service. [1]
• The platform / marketplace model (rideshare, 4853). Asset-light software that owns few cars and keeps a take rate — its cut of the fare. Profit turns on local liquidity (dense driver supply shortens waits and lifts utilization); insurance is the largest per-trip cost; drivers are microbusinesses whose costs the platform does not carry, which is why it scales. [3]
• The contract / purchased-transportation model (school bus 4854, most of paratransit/shuttle 4859, rural intercity 4852, contract transit). A buyer — a school district, transit agency, employer, or Medicaid plan — pays a private operator per vehicle-hour, per mile, per trip, or a fixed fee to run defined routes, usually on multi-year contracts. Margins are thin and labor-dominated; the appeal is repeatable, infrastructure-like cash flow, which is exactly why pension and infrastructure capital owns the biggest operators. [4][6]
• The asset-heavy utilization model (charter 4855, limousine within 4853, intercity operators 4852). The operator owns an expensive depreciating fleet that earns only when it is rolling with a paying group aboard but costs money every day regardless. High operating leverage: fill the vehicle and margins are strong; leave it idle and they collapse. Utilization, deadhead (unpaid repositioning) miles, and revenue mix are everything. [3][5]
• The broker / capitation model (NEMT brokers inside 4859). A broker signs a statewide or plan-wide contract paid a capitated fee — a fixed dollar amount per member per month whether or not the member rides — and profits by arranging the required trips for less. Efficient at scale, but it breaks when driver pay, fuel, and insurance rise faster than the fixed fee. [6]

The common thread. Whatever the model, the cost stack is the same shape: driver labor first (often two-thirds of operating cost), then insurance and fuel, then vehicles and depots. That is why the whole subsector lives or dies on driver availability and insurance inflation — the two themes that cut across all six children. [1][3][4][5][6]

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6. Demand drivers

Demand splits into a defensive core and a cyclical edge, and the mix is what makes the subsector as a whole reasonably durable but locally volatile. [1][3][4][6]

• Defensive, structurally supported. Student transportation tracks K-12 enrollment and busing rules; special-needs/medical transport (NEMT) rides an aging population (~55.9M Americans are 65+), rising Medicaid caseloads, and a legal duty to fund rides to care; urban transit demand is a policy choice set by tax and grant funding. These are relatively recession-resistant, but growth is slow and gated by public budgets. [1][4][6]
• Cyclical, discretionary. Rideshare and limousine ride urban density, corporate and leisure travel, and household wealth; charter follows tourism, events, and school trips; intercity bus is countercyclical on price (it wins when gas and airfares spike or the economy softens); airport/hotel shuttles follow air-travel and hospitality volumes. These recover and contract with the business cycle. [2][3][5][6]
• Shared levers across all six: driver supply (the binding constraint everywhere), fuel prices (both a cost and a substitution factor that pushes travelers onto buses), the secular outsourcing of transport by agencies, districts, airports, and employers who would rather contract than own vehicles, and public funding availability, since so much of the subsector is bought by governments. The Infrastructure Investment and Jobs Act (IIJA) authorizes up to $108 billion for public transportation through 2026, the single biggest funding lever over the subsector. [1][4][6][10]

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7. Regulation

Regulation is layered across federal, state, and local levels and differs sharply by child — but a few federal bodies recur across the whole subsector. [1][3][5][6]

• Federal Transit Administration (FTA) — grant conditions, National Transit Database reporting, transit safety plans, and Buy America domestic-content rules for the transit child; also the Section 5311(f) rural intercity-bus set-aside that keeps thin bus routes alive. [1][2]
• Federal Motor Carrier Safety Administration (FMCSA) — safety oversight and operating authority for for-hire buses, coaches, and larger limousines, including a $5 million minimum liability requirement for vehicles carrying 16 or more passengers. [2][5]
• Federal Railroad Administration (FRA) — the heavier regime (Positive Train Control, Railway Labor Act, Railroad Retirement) for commuter rail inside the transit child. [1]
• National Highway Traffic Safety Administration (NHTSA) — federal motor-vehicle safety standards governing how buses are built (a manufacturing rule, not an operating one). [4]
• State and local rules — Transportation Network Company (TNC) laws for rideshare, city taxi/medallion and airport-access control, state livery and utility commissions for limousines, and district contracts for school buses. [3][4]
• Medicaid rules — for NEMT, federal Medicaid law makes covered medical transport a statutory benefit, so here regulation is a demand floor rather than a cost. [6]

Two rules cut across the whole subsector: the Americans with Disabilities Act (ADA), which mandates accessibility and complementary paratransit, and driver classification — whether drivers are employees or contractors — which is existential for the rideshare platform model and a live cost question for every contract operator. [3][6]

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8. Consolidation

The consistent pattern across NAICS 485 is consolidation at the top over a stubbornly fragmented base, financed largely by institutional capital. [3][4][5][6]

• Rideshare (4853) is already a national duopoly (Uber ~76% of U.S. rideshare, Lyft the rest) sitting atop a long tail — and its clearest casualty is the taxi medallion, whose value fell ~90% from its 2014 peak. The platforms are now aggregating the limousine trade too, absorbing thousands of independent chauffeurs as subcontractors (Uber's announced Blacklane deal; Lyft's TBR Global Chauffeuring purchase). [3]
• School bus (4854), charter (4855), and paratransit (4859) are being rolled up by infrastructure, pension, and PE funds — EQT (First Student), CDPQ (Student Transportation of America), I Squared, Audax, and a broker duopoly forming in NEMT (ModivCare, MTM). Low national concentration (school bus HHI 324, charter 100, other 103) shows the roll-up is far from finished. [4][5][6]
• Intercity bus (4852) has consolidated into two poles: the platform aggregator (Flix, owner of Greyhound) versus regional independents, with weak balance sheets failing along the way. [2]
• Two cautionary and cross-cutting forces. First, leverage: the Coach USA/Megabus Chapter 11 (crushed by debt from a private-equity buyout) is the warning that runs through the bus children. Second, the autonomous-vehicle frontier (Waymo furthest ahead) — the single force that could reshape the driver-cost base of the entire subsector, for better (removing labor cost) or worse (routing trips around today's operators). [2][3][5]

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9. Risks

The subsector's risks are the union of the children's, and several are genuinely shared across all six: [1][3][4][5][6]

• Driver labor — chronic shortages and wage inflation are the defining operational risk everywhere; when wages outpace contract escalators or fixed fees, margins bleed. [4][6]
• Insurance-cost inflation — commercial-auto premiums are large, volatile, and rising, driven by "nuclear" jury verdicts; some charter operators report liability quotes above $50,000 per vehicle, and a single catastrophic crash can be existential. [5][3]
• Subsidy, reimbursement, and funding dependence — urban transit faces a post-COVID operating "fiscal cliff" and a federal reauthorization deadline (the IIJA transit program expires September 30, 2026); NEMT depends on Medicaid rates that rise slower than costs; rural intercity and school-bus electrification lean on federal budget lines that can be cut. [1][6][10]
• Demand cyclicality — discretionary segments (rideshare, limo, charter, shuttles, intercity) contract in downturns and travel shocks. [3][5]
• Driver reclassification — the biggest single threat to the rideshare platform model, and a live cost exposure for every contract operator. [3]
• Leverage — PE- and infrastructure-financed fleets carry debt that sinks operators when demand dips (the Coach USA lesson). [5]
• Autonomous-vehicle substitution — a two-sided long-run wildcard that could strip out driver cost or disintermediate today's operators. [3][6]
• Data undercount — because so much activity is government-run or owner-operated, the official numbers understate the subsector; do not read low measured concentration as an untapped profit pool — it more often signals weak pricing power. [6][8]

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10. How to invest & outlook

Public-market routes funnel to a short list, and most are indirect. The whole subsector's clean public equity is essentially Uber (UBER) and Lyft (LYFT) in the rideshare child — judged on gross-bookings growth, take rate, insurance reserves, driver supply, and the path to free cash flow — plus autonomous-vehicle optionality via Alphabet, Tesla, and Amazon. Everything else is a proxy: equipment and technology makers (Wabtec, NFI Group, Blue Bird, REV Group, Verra Mobility, Conduent) for the fleet-and-safety spend; foreign-listed operators (Mobico, Kelsian, ComfortDelGro) for contract, charter, and intercity operations; a listed asset manager (EQT) for a thin school-bus sliver; and municipal bonds for the government-run transit child. There is no "NAICS 485" ETF (exchange-traded fund), and no U.S.-listed pure-play in transit, school bus, charter, intercity, or paratransit. [1][3][4][5][6]

Private-market routes are where most of the subsector actually lives. This is predominantly an infrastructure, private-equity, and private-credit arena: contract operators with infrastructure-like cash flows (school bus, transit contract, NEMT), roll-ups of fragmented charter/limo/paratransit operators, fleet and depot financing against vehicle residuals, dispatch/booking/compliance software, and — in transit — the often-most-attractive trade, transit-oriented station-area real estate. Underwrite on normalized EBITDA (earnings before interest, taxes, depreciation and amortization) and free cash flow after fleet-replacement capital spending, with local-licensing and contract fluency. [1][4][5][6]

Outlook (editorial judgment). The base case is a durable but slow-growing, mostly private services subsector whose returns hinge on execution — utilization, contract terms, and cost discipline — far more than on ride volume. Watch four swing factors that sit largely outside any single company's control:

1. Federal transit funding — whether Congress reauthorizes the IIJA transit program by September 30, 2026, and whether states permanently plug the post-COVID operating gap. IIJA capital money should keep equipment demand firmer than strained operating budgets, so suppliers can outperform the agencies they serve. [1][10]
2. Driver labor and insurance — the two costs that set margins across all six children; the operators who manage them best win. [4][5]
3. Reimbursement policy — Medicaid NEMT rates and school-bus electrification subsidies, which can move whole segments overnight. [4][6]
4. Autonomy — the slow but potentially transformative robotaxi rollout, the one force that could reshape the driver-cost base of the entire subsector. [3]

Bottom line. NAICS 485 is a ~$50.9 billion, ~459,000-employee measured private slice of a much larger ground-passenger-transportation economy that is mostly government-run or privately held. Its six children invert one another — school bus employs the most people, rideshare earns the most money and is the only large public bet, transit is a government service you finance rather than own, and charter, intercity, limo, and paratransit are fragmented private trades being rolled up by institutional capital. You do not buy "transit and ground passenger transportation"; you pick the child, match the vehicle (stock, muni bond, or fund) to how that child is owned, and underwrite driver labor and insurance above all. For the full analysis of any one business, read its child primer (4851, 4852, 4853, 4854, 4855, 4859). [1][2][3][4][5][6]

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Sources

Synthesized from the six child primers plus our ground-truth federal statistics for NAICS 485. Figures for each child are drawn from that child's primer; subsector totals are from the 485 stats file.

1. Histometrics primer, "Urban Transit Systems (United States) — NAICS 4851" (government-agency ownership; farebox recovery; muni bonds and listed suppliers; ~$93B real public-transit activity; IIJA; fiscal cliff and Sept 30, 2026 reauthorization). Internal.
2. Histometrics primer, "Interurban and Rural Bus Transportation — NAICS 4852" (Flix SE / Greyhound; private ownership; ~90% ridership recovery; Section 5311(f); Bus Regulatory Reform Act; Coach USA bankruptcy). Internal.
3. Histometrics primer, "Taxi and Limousine Service — NAICS 4853" (Uber/Lyft duopoly; the revenue-vs-headcount inversion; 1099 drivers; platform economics; TNC law and driver classification; medallion collapse; Waymo/Zoox/Tesla AV). Internal.
4. Histometrics primer, "School and Employee Bus Transportation — NAICS 4854" (contract model; ~$27–28B total student transport; EQT/CDPQ/I Squared/Audax ownership; Blue Bird, Verra Mobility; Clean School Bus Program). Internal.
5. Histometrics primer, "The Charter Bus Industry — NAICS 4855" (asset-heavy utilization; deep fragmentation; Kelsian, NFI/MCI; PE roll-ups; insurance-cost inflation; ABA motorcoach census). Internal.
6. Histometrics primer, "Other Transit and Ground Passenger Transportation — NAICS 4859" (special-needs/NEMT vs shuttle/vanpool; ModivCare/MTM brokers; capitation model; Medicaid NEMT mandate; ~$11–17B NEMT estimate; Via/Mobico/ABM proxies). Internal.
7. Histometrics ground-truth statistics, NAICS 485 (U.S. Census Bureau, County Business Patterns 2023 — establishments 20,377; employees 458,871; annual payroll $18,503,271k; Q1 payroll $4,506,965k; and 2022 Economic Census — firms 16,527; receipts $50,874,247k; CR4 30.7% / CR8 37.0% / CR20 44.7% / CR50 52.1%; HHI suppressed). Internal / https://www.census.gov/programs-surveys/cbp.html; https://www.census.gov/programs-surveys/economic-census.html
8. U.S. Census Bureau, County Business Patterns and Economic Census methodology (employer-establishment coverage; exclusion of government-owned operations, the self-employed, and nonemployer businesses) and Nonemployer Statistics. https://www.census.gov/programs-surveys/cbp/technical-documentation/methodology.html; https://www.census.gov/programs-surveys/nonemployer-statistics.html
9. Federal Transit Administration, National Transit Database and "2024 National Transit Summaries and Trends"; American Public Transportation Association, "2024 Public Transportation Fact Book" (~$93B public-transit activity; >430,000 employed; 7.7 billion trips in 2024). https://www.transit.dot.gov/ntd; https://www.apta.com/
10. Federal Transit Administration, "The Infrastructure Investment and Jobs Act (IIJA)" (up to $108B for public transportation through 2026; ~$21.4B/yr transit program expiring September 30, 2026). https://www.transit.dot.gov/IIJA