Specialized Freight (except Used Goods) Trucking, Local — Industry Primer

NAICS 2022 code 48422 — United States

Single-child pass-through. In the North American Industry Classification System (NAICS — the U.S. government's standard industry taxonomy), this five-digit industry, 48422, contains exactly one six-digit national industry: 484220, Specialized Freight (except Used Goods) Trucking, Local. The two codes cover the identical set of businesses and carry the identical federal statistics; the extra digit is just a taxonomy formality. This page is a short rollup — it gives 48422's own ground-truth numbers and orients you, then points you to the full [484220 primer] for the detailed treatment of segments, economics, regulation, named companies, and how to invest.

1. Overview

This is the business of hauling specialized cargo short distances — usually within a metropolitan area, generally on same-day round trips — using purpose-built equipment rather than a plain enclosed box trailer [1]. Think dump trucks moving sand and gravel, mixer drums and pneumatic tankers moving concrete and cement, flatbeds moving building materials, tankers moving fuel, chemicals or milk, and refrigerated ("reefer") trucks moving food [1]. It is the local physical link between quarries, concrete plants, farms and fuel terminals and the job sites, stores and processors a few miles away.

For an investor it matters because it is a direct, high-torque read on the local physical economy — above all construction — and because it is enormous, essential, and one of the most fragmented industries in the country, which shapes how anyone can own a piece of it. There is effectively no pure-play listed stock: public exposure is indirect (building-materials producers and diversified carriers), while the real industry is a private market of tens of thousands of small fleets and owner-operators.

2. What's inside — and why this level equals its one child

Five-digit NAICS industries usually gather several distinct six-digit national industries. This one does not: 48422 has a single child, 484220, so the parent is definitionally identical to the child — same scope, same boundaries, same data. Nothing is added or averaged in the rollup.

Within that single industry, the economically meaningful segments are defined by equipment — dump/aggregate hauling (the largest, most construction-tied slice), ready-mix concrete and cement, bulk-liquid and dry-bulk tankers, refrigerated local delivery, flatbed/heavy-haul, and agricultural (milk, livestock, crops) [1]. Related work that sits in other codes — local general freight (484110), long-distance specialized (484230), household movers (484210), and waste collection (NAICS group 5621) — is deliberately excluded [1]. The full segment map and exclusion list live in the [484220 primer].

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

Because 48422 equals 484220, its rollup statistics are the child's statistics. Figures below are our ground-truth federal data, from the U.S. Census Bureau (County Business Patterns and the 2022 Economic Census).

Undercount caveat (important). These are employer figures — businesses with payroll. County Business Patterns (CBP) excludes the self-employed and businesses without paid employees, and the dominant gap here is the single-truck owner-operator (one person, one truck, no payroll) [4]. That gap is large and small/individual ownership dominates this industry: private research firm IBISWorld counts roughly 78,000 businesses in local specialized freight trucking — more than double the ~32,000 employer establishments Census records — and pegs total industry revenue near $72 billion (a later year) versus the $57.5 billion employer-only Census receipts [5][3]. On top of that, municipal public-works dump trucks are counted under government and producers' captive delivery fleets under manufacturing/mining. The true footprint is meaningfully larger than the employer-firm statistics show.

Our federal file for this level does not provide fleet size, miles, utilization, rates, margins, or nonemployer counts; those are not inferred here.

4. The investable universe (where value concentrates)

With one child, there is no cross-child split — value concentrates by segment and business model, not by sub-code. The short version:

• Public pure-plays: essentially none. The last sizeable listed specialized carrier, Daseke, was taken private by TFI International in 2024 [6]. Public exposure is indirect, through (a) building-materials producers whose captive fleets do this hauling — Vulcan Materials (NYSE: VMC), Martin Marietta (NYSE: MLM), Knife River (NYSE: KNF) — and (b) diversified carriers with a specialized book — TFI International (TFII), Landstar (LSTR), CSX (CSX, which owns bulk-tank leader Quality Carriers) [6][7][8].
• Private ownership is the real industry — tens of thousands of local dump, ready-mix, flatbed and tanker fleets and owner-operators, plus private-equity roll-ups concentrated in the higher-barrier tank/hazmat/food-grade niches (e.g., Kenan Advantage Group, Quality Carriers) [9][8].

The full company-by-company tables — public proxies and major private owners — are in the [484220 primer].

5. How the money works

Local specialized trucking is billed by the hour, the ton, the load, or the yard — not mainly by the mile, because trips are short and same-day [10]. Revenue is capped by turns per day and payload per turn, so utilization — keeping the truck loaded and moving, minimizing wait time — is the core profit driver. The work is inherently local because aggregates are cheap and heavy: freight is a big share of delivered price, so most moves stay within ~25–50 miles [10]. It is a thin-margin, high-fixed-cost business — driver, equipment, fuel, insurance and maintenance dominate the cost stack — and industry profit margins have slid from about 8.9% (2021) to 6.3% (2026) through the recent freight downturn [5]. Fuel surcharges pass diesel swings to customers, but with a lag. Full economics (cost-per-mile detail, owner-operator take-home, operating ratio) are in the [484220 primer].

6. What drives demand

Demand is cyclical and mostly construction-led — residential, commercial and public building drives dump, aggregate and ready-mix hauling, so a fleet's fortunes track local construction and interest rates [11]. Federal infrastructure money under the Infrastructure Investment and Jobs Act (IIJA) — the ~$1.2 trillion 2021 law — is a current tailwind for aggregate and asphalt work [12]. The tanker segments follow industrial output and fuel demand; agricultural hauling follows farm output (roughly 80% of U.S. bulk milk moves by tanker). Construction-linked hauling is also seasonal. Full detail is in the [484220 primer].

7. Regulation

Even a one-truck local operation is heavily regulated, mostly through the Federal Motor Carrier Safety Administration (FMCSA), part of the U.S. Department of Transportation. Key items: federal Hours of Service limits (with a 150-air-mile short-haul exception that gives local fleets real relief), Electronic Logging Device rules, the Commercial Driver's License (CDL) plus Tanker and Hazmat endorsements (which shrink the qualified-driver pool), insurance minimums, and — for fuel/chemical haulers — hazmat rules under the Pipeline and Hazardous Materials Safety Administration [13][14][15]. Emissions mandates (EPA's model-year-2027 standards and California's clean-fleet rules) will force fleet turnover, though short local duty cycles suit electrification well [16]. The full regulatory walkthrough is in the [484220 primer].

8. Consolidation

This is one of the most fragmented industries in the entire U.S. economy. The federal concentration data make the point: the four largest firms hold just 1.8% of receipts, the top 8 hold 2.9%, the top 20 hold 5.4%, and even the top 50 hold under 10% (9.9%); the Herfindahl-Hirschman Index (HHI — a standard concentration measure where 10,000 is a monopoly and under 1,500 is unconcentrated) is a near-zero 2.4 [3]. No one has national pricing power. Where consolidation is happening, it is at the specialized, higher-barrier end — tank truck (Kenan Advantage Group, CSX's Quality Carriers), flatbed/specialized (TFI's Daseke deal), and building materials assembling quarry-plus-fleet networks — while the commodity dump/aggregate core stays atomized [8][9][6].

9. Risks

The main risks carry over unchanged from the child: cyclicality tied to construction and rates; the IIJA funding cliff (surface-transportation authorization runs out September 30, 2026, a genuine forward risk, not a settled outcome); fuel-price volatility; driver availability and wage inflation, especially for endorsed tanker/hazmat drivers; rising insurance and "nuclear verdict" litigation that hit under-capitalized small operators hardest; thin margins with capped upside; customer concentration; capital intensity and regulatory capex for cleaner equipment; and safety/spill/hazmat liability. There is also a data risk: employer-based federal statistics understate the number of small operators [12][17][4]. Fuller discussion is in the [484220 primer].

10. How to invest and the outlook

Because 48422 is identical to 484220, the investment picture is the same. Public routes are proxies, not pure-plays: aggregates and building-materials producers (Vulcan, Martin Marietta, Knife River) whose delivery fleets are local specialized hauling, and diversified/specialized carriers (TFI, Landstar, CSX) whose specialized slice is partial — read segment disclosures, not the corporate label [6][7][8]. Private routes are where the industry actually sits: owning or building a fleet, the owner-operator entry point, leased-on models, and private-equity roll-ups in the higher-barrier tank/hazmat/food-grade niches [9][8].

Near-term outlook. Infrastructure execution under IIJA is at or near its peak, supporting aggregate and asphalt hauling through 2026, but the September 2026 authorization deadline injects real uncertainty into what follows [12]. Rate-sensitive residential and commercial construction remains the swing factor. After the brutal 2023–25 freight downturn, a cyclical recovery would lift depressed margins, though structural cost inflation (drivers, insurance, equipment) caps the upside. At bottom, both public proxies and private fleet ownership are leveraged bets on how much America builds. For the complete treatment — segment detail, named private owners, full financials, the regulatory checklist, and a private-diligence guide — see the [484220 primer].

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Sources

1. U.S. Census Bureau. "2022 NAICS Definition — 484220 Specialized Freight (except Used Goods) Trucking, Local." https://www.census.gov/naics/?details=484220&year=2022
2. U.S. Census Bureau. County Business Patterns, NAICS 484220/48422 (2023) — establishments, employment, annual and Q1 payroll. https://www.census.gov/data/datasets/2023/econ/cbp/2023-cbp.html
3. U.S. Census Bureau. 2022 Economic Census, "Concentration of Largest Firms," NAICS 484220 — receipts, firms, HHI, concentration ratios. https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN
4. U.S. Census Bureau. "County Business Patterns Methodology" (employer-only coverage; exclusions). https://www.census.gov/programs-surveys/cbp/technical-documentation/methodology.html
5. IBISWorld. "Local Specialized Freight Trucking in the US" (report 1155, 2026) — ~78,000 businesses, ~$72B revenue, margins 8.9%→6.3%. https://www.ibisworld.com/united-states/industry/local-specialized-freight-trucking/1155/
6. FreightWaves / TFI International. "TFI International completes Daseke acquisition" (2024). https://www.freightwaves.com/news/daseke-now-part-of-tfi-international-as-acquisition-closes
7. Vulcan Materials Company; Martin Marietta Materials; Knife River Corporation. FY2024 results (building-materials producers with captive local fleets). https://ir.martinmarietta.com/
8. CSX Corporation. "CSX Completes Acquisition of Quality Carriers" (largest bulk-tank fleet) (2021). https://www.csx.com/index.cfm/about-us/media/press-releases/csx-completes-acquisition-of-quality-carriers/
9. Kenan Advantage Group / Transport Topics. Company profile (largest N. American tank carrier; growth by acquisition). https://www.thekag.com/company/about/
10. HaulIt / Peaks Sand & Gravel. "Dump Trailer Hauling Rates" and 2024–25 price list (per-load/per-hour pricing; local haul radius). https://haulit.com/dump-trailer-hauling-rates/
11. U.S. Census Bureau. "Value of Construction Put in Place: December 2025" (private −2.9%, public +3.6% in 2025). https://www.census.gov/construction/c30/pdf/pr202512.pdf
12. Congressional Research Service. "Funding and Financing Highways and Public Transportation Under the IIJA" (R47573); authorization expiry Sept 30, 2026. https://www.congress.gov/crs-product/R47573
13. Federal Motor Carrier Safety Administration. "Summary of Hours-of-Service Regulations" and 150-air-mile short-haul exception. https://www.fmcsa.dot.gov/regulations/hours-service/summary-hours-service-regulations
14. Federal Motor Carrier Safety Administration. "Commercial Driver's License Program" (endorsements). https://www.fmcsa.dot.gov/cdl
15. Pipeline and Hazardous Materials Safety Administration. "Training Requirements for Industry." https://www.phmsa.dot.gov/training/hazmat/training-requirements-industry
16. U.S. Environmental Protection Agency. "Heavy-Duty Engine and Vehicle Standards" (final rule, model year 2027). https://www.epa.gov/regulations-emissions-vehicles-and-engines
17. U.S. Bureau of Labor Statistics. "Heavy and Tractor-Trailer Truck Drivers: Occupational Outlook Handbook" (~4% growth 2024–34). https://www.bls.gov/ooh/transportation-and-material-moving/heavy-and-tractor-trailer-truck-drivers.htm

For the full, source-by-source treatment of this industry — including the complete company tables and the detailed regulatory and economic sections — see the child primer for NAICS 484220, from which this rollup is synthesized.