TruckCodex

BYLER TRUCKING SERVICES LLC

USDOT 2637059 Active AUTHORIZED FOR HIRE Conditional rated Company officer: JONATHAN BYLER Company officer 2: CHAD WALTERS Construction Other (SAND / GRAVEL) Based in INGLESIDE, MD Grade A · 89
Brokers & shippers · booking check

Book with caution — review signals below

No hard OOS / revoked / uninsured blocker, but elevated risk signals need a human look before booking.

Caution
Policy effective · Jan 1, 2025
Review these
  • Conditional safety rating Carrier did not meet the safety fitness standard at the last compliance review.
On file
  • 1 active operating authority
  • Insurance on file · $750,000 ZURICH AMERICAN INSURANCE COMPANY · 91X Details →
  • BOC-3 process agent on file NATIONAL RESIDENT AGENT SERVICE, INC. Details →
  • OOS rate better than size peers
Company officer: JONATHAN BYLER
Company officer 2: CHAD WALTERS
Cargo: Construction, Other (SAND / GRAVEL)
Built for brokers and shippers deciding whether to tender. Always confirm on FMCSA SAFER and L&I before booking — TruckCodex mirrors public filings and can lag by up to a day.
Plain-text risk summary (print / paste) 
TruckCodex risk summary — BYLER TRUCKING SERVICES LLC (USDOT 2637059)
Verdict: CAUTION
Book with caution — review signals below
No hard OOS / revoked / uninsured blocker, but elevated risk signals need a human look before booking.

Authority / census status: Active
Active BIPD limit: $750,000
Officer(s): JONATHAN BYLER (Company officer); CHAD WALTERS (Company officer 2)

Blockers:
  (none)

Cautions:
  • Conditional safety rating — Carrier did not meet the safety fitness standard at the last compliance review.

On file:
  • 1 active operating authority
  • Insurance on file · $750,000 — ZURICH AMERICAN INSURANCE COMPANY · 91X
  • BOC-3 process agent on file — NATIONAL RESIDENT AGENT SERVICE, INC.
  • OOS rate better than size peers

Source: https://truckcodex.com/usdot/2637059/
As of: Jul 18, 2026
Always confirm on FMCSA SAFER and L&I before tendering — TruckCodex mirrors public filings and can lag by up to a day.
TruckCodex · compliance grade

Compliance grade A

Composite of 5/5 scored components (mean 89/100). Expand for per-signal evidence. Heuristic — not an FMCSA rating or legal advice.

A confidence 100% · 5/5 signals
Authority / census
Active · 100/100

Active census status with no OOS order or revoked authority on file.

Insurance / BIPD
BIPD active · 100/100

Active BIPD/Primary-like policy on file in our insurance history.

OOS vs peers
Safer than peers · 100/100

Driver OOS 0% vs peer median 0% (neutral). Vehicle OOS 0% vs peer median 15% (better). n=37967 same-size ACTIVE peers.

FMCSA safety rating
Conditional · 45/100

Official FMCSA Conditional safety rating.

Insurance-watch tier
Not on watch · 100/100

No BMC-91 insurance-lapse watch classification on file for this USDOT.

TruckCodex compliance grade from authority, BIPD, peer OOS, FMCSA safety rating, and insurance-watch signals. Not legal advice. See methodology. Booking triage on this page: Caution.

Operating authority
Insurance

ZURICH AMERICAN INSURANCE COMPANY · 91X · $750,000

1 active policy

BOC-3 agent

NATIONAL RESIDENT AGENT SERVICE, INC.

Company profile

Company details
USDOT 2637059
In FMCSA records since May 20, 2015 (~11y)
MC / docket MC918498
Company officer JONATHAN BYLER
Company officer 2 CHAD WALTERS
Operation AUTHORIZED FOR HIRE
Cargo carried
Construction, Other (SAND / GRAVEL)
Fleet size 27 units
Drivers 21
Annual mileage 1,265,960 mi
Contact & address
Phone: (717) 438-4800
Email: [email protected]
Physical
1120 MERRICK CORNER ROAD
INGLESIDE, MD 21644
Mailing
118 SPRINGWOOD DRIVE SUITE 300
LEBANON, PA 17042
Registration & safety rating
USDOT 2637059
In FMCSA records since May 20, 2015 (~11y)
Operation AUTHORIZED FOR HIRE
Annual mileage (MCS-150) 1,265,960 mi
Safety Rating Conditional
vs. National Average
Vehicle OOS Rate 0.0% vs 23.4% -23.4 pts
Driver OOS Rate 0.0% vs 6.7% -6.7 pts
Violations per Inspection 0.35 vs 1.80 -1.45
Peer tier (mid-sized fleets (11-100 power units)) median OOS rate: 27.3%
Active insurance
Related filings

Fleet details (MCS-150)

Vehicle type Owned Term leased Trip leased
Trucks 27 0 0

Self-reported on the carrier’s Form MCS-150 (FMCSA Company Census).

Accident reports (24 months)

All 9 crashes →
Last 6 months 6–12 months 12–24 months Total
Fatalities 0 0 0 0
Injuries 1 0 0 1
Tow-away 1 0 1 2
Crash reports 1 0 1 2

Reportable crashes from FMCSA MCMIS for the trailing 24 months. Counts may differ slightly from SAFER due to reporting lag.

Inspections (24 months)

All 134 inspections →
Driver Vehicle Hazmat
Inspections 77 77 0
OOS inspections 1 0 0
OOS percentage 1.3% 0% —
National average 6.67% 22.26% 4.44%

Roadside inspections in the last 24 months. National averages are FMCSA MCSAP reference rates (driver ~6.7%, vehicle ~23.4%, hazmat ~4.4%).

Power Units
27
Drivers
21
Inspections
134
FMCSA roadside history
OOS Rate (peak)
—
Crashes (24m)
2
9 all-time
Authorities
1
1 active
Carrier analysis & narrative context SEO summary, status notes, AI overview, and safety profiles

BYLER TRUCKING SERVICES LLC is a motor carrier based in INGLESIDE, MD, registered with the FMCSA under USDOT 2637059. The carrier is currently active in FMCSA's records, with a safety rating of Conditional. MCS-150 self-reporting puts the fleet at 27 power units and 21 drivers, with 134 roadside inspections on file. Use this page to verify the carrier's authority and insurance, review its inspection and crash history, and cross-reference live data on FMCSA SAFER before booking a load or onboarding a partner.

Conditional safety rating

FMCSA has assigned this carrier a Conditional safety rating.

Carrier overview

BYLER TRUCKING SERVICES LLC is a mid-sized fleet, operating 27 power units and 21 drivers, with 5 years on FMCSA's records, based in Ingleside, MD. Across 80 roadside inspections in the last 24 months, the fleet recorded a 1.3% out-of-service rate, with 3 reportable crashes. all filed authority types (common) are currently revoked.

Inspection profile

80 roadside inspections over the last 24 months, up 60% versus the prior 24 months, concentrated in MD (69) and DE (6), with Level 2 inspections the most common.

Violation profile

1.3% out-of-service rate; led by Unsafe Driving (64.5% of violations); top code 392.2 (Operating a CMV while ill or fatigued) cited 5 times.

Fleet profile

The fleet comprises 27 power units (mid-sized fleet) and 21 drivers; Peterbilt, Western Star, and Kenworth are the most-inspected makes.

Risk Signals

Authority revoked
1 revocation on record.

Out-of-Service rate vs same-size peers FMCSA roadside inspections, % placed out-of-service

Compared against 37,967 ACTIVE carriers operating 13–41 power units (±50% of this carrier's 27 unit fleet).

This carrier — Driver OOS
0%
Drivers placed out-of-service at roadside inspections
Peer median
0%
Median across 37,967 same-size peers
Verdict
On par with peers
Delta 0 pts vs peer median (lower is safer)
This carrier — Vehicle OOS
0%
Vehicles placed out-of-service at roadside inspections
Peer median
15%
Median across 37,967 same-size peers
Verdict
Safer than peers
Delta -15 pts vs peer median (lower is safer)
Inspection Analytics Monthly activity · BASIC mix · state map

Monthly Inspection Activity (24 months)

2024-07 2026-06

Violations by BASIC Category

Federal BASIC buckets for every citation issued against this carrier over the past 24 months.
Unsafe Driving
19 violations
Vehicle Maintenance
7 violations
Driver Fitness
1 violation
1 OOS · 100.0%

Activity by State

States this carrier has been inspected in over the past 24 months.
State Inspections OOS OOS % Last Inspection
Maryland (MD) 67 0 0.0% Jun 16, 2026
Delaware (DE) 6 1 16.7% Jun 30, 2026
Pennsylvania (PA) 4 0 0.0% Dec 3, 2025
Vehicle Fleet Top makes and models observed in roadside inspections
Make Model Inspections
Peterbilt 105
Western Star 6
Kenworth 2
Freightliner 1
Great Dane 1
Mack 1
Polar 1
SMS BASIC Scores FMCSA Safety Measurement System per-BASIC scores
BASIC Inspections Serious Measure Percentile Alert As Of
Driver Fitness 1 — 0.06 0 — Jul 13, 2026
Controlled Substances / Alcohol 0 — 0.00 0 — Jul 13, 2026
Hours of Service 0 — 0.00 0 — Jul 13, 2026
Unsafe Driving 9 — 1.89 2 — Jul 13, 2026
Vehicle Maintenance 6 — 0.32 0 — Jul 13, 2026

Higher percentiles indicate worse performance relative to peer carriers. Carriers at or above the FMCSA intervention threshold are marked ALERT.

Recent Inspections (134 rows) View all 134 →
Inspection # Date ▼ State Level Station Vehicle Violations Top Codes OOS
88293261 Jun 30, 2026 DE 3 —
PETERBILT STRAIGHT TRUCK
MD 331ED14 · 1NPCX4EX7ND778519
0 — No
88182768 Jun 16, 2026 MD 2 —
PETERBILT STRAIGHT TRUCK
MD 359ED81 · 1NPCX4EX5RD859234
0 — No
87913607 May 19, 2026 MD 2 —
PETERBILT STRAIGHT TRUCK
MD 352ED89 · 1NPCX4EX1PD807239
0 — No
87845348 May 13, 2026 MD 1 —
PETERBILT STRAIGHT TRUCK
MD 359ED84 · 1NPCX4EX0RD859237
0 — No
87341215 Mar 16, 2026 MD 2 GRASONVILLE MD
PETERBILT STRAIGHT TRUCK
MD 378ED15 · 1NPCX4EX8TD787548
0 — No
87299061 Mar 16, 2026 DE 2 DOVER DE
PETERBILT STRAIGHT TRUCK
MD 359ED83 · 1NPCX4EX2PD859236
1 392.2-SLLTL No
87271253 Mar 11, 2026 MD 2 SYKESVILLE MD
PETERBILT STRAIGHT TRUCK
MD 385ED32 · 1NPCX4EX8TD787551
0 — No
87272217 Mar 9, 2026 DE 1 MIDDLETOWN DE
PETERBILT STRAIGHT TRUCK
MD 340ED98 · 1NPCX4EX0ND802420
1 391.41APC Yes
87240525 Mar 6, 2026 DE 3 MILFORD DE
PETERBILT STRAIGHT TRUCK
MD 331ED14 · 1NPCX4EX7ND778519
1 392.2-SLLS4 No
87238073 Mar 6, 2026 MD 2 CENTREVILLE MD
PETERBILT STRAIGHT TRUCK
MD 384ED38 · 1NPCX4EX6TD787550
0 — No
87084678 Feb 18, 2026 MD 2 GRASONVILLE MD
PETERBILT STRAIGHT TRUCK
MD 384ED38 · 1NPCX4EX6TD787550
0 — No
87086247 Feb 16, 2026 MD 2 GALENA MD
PETERBILT STRAIGHT TRUCK
MD 359ED81 · 1NPCX4EX5RD859234
0 — No
87025311 Feb 10, 2026 MD 1 SYKESVILLE MD
PETERBILT STRAIGHT TRUCK
MD 385ED38 · 1NPCX4EXXTD787549
0 — No
86992044 Feb 3, 2026 MD 2 WARWICK MD
PETERBILT STRAIGHT TRUCK
MD 261ED55 · 1NPSX7EX6LD613944
0 — No
86857634 Jan 20, 2026 MD 2 ANNAPOLIS MD
PETERBILT STRAIGHT TRUCK
MD 384ED38 · 1NPCX4EX6TD787550
1 392.2-SLLEWG1 No
86799165 Jan 13, 2026 MD 2 CHESTER MD
PETERBILT STRAIGHT TRUCK
MD 384ED38 · 1NPCX4EX6TD787550
0 — No
86785305 Jan 12, 2026 MD 2 CHESTER MD
PETERBILT STRAIGHT TRUCK
MD 385ED32 · 1NPCX4EX8TD787551
0 — No
86773813 Jan 12, 2026 MD 2 CHURCH HILL MD
PETERBILT STRAIGHT TRUCK
MD 340ED95 · 1NPTX4EX6JD412948
1 392.2-SLLS4 No
86656484 Dec 22, 2025 MD 3 CHURCH HILL MD
PETERBILT STRAIGHT TRUCK
MD 352ED90 · 1NPCX4EXXPD807238
0 — No
86611503 Dec 18, 2025 MD 2 QUEEN ANNE MD
PETERBILT STRAIGHT TRUCK
MD 378ED15 · 1NPCX4EX8TD787548
0 — No
86600705 Dec 17, 2025 MD 2 QUEEN ANNE MD
PETERBILT STRAIGHT TRUCK
MD 385ED32 · 1NPCX4EX8TD787551
0 — No
86538141 Dec 10, 2025 MD 2 QUEEN ANNE MD
PETERBILT STRAIGHT TRUCK
MD 384ED38 · 1NPCX4EX6TD787550
0 — No
86493255 Dec 3, 2025 PA 3 PA
PETERBILT STRAIGHT TRUCK
MD 284ED45 · 1NPTX4EX6JD412948
1 392.2-SLLTR No
86256657 Nov 5, 2025 PA 2 —
PETERBILT STRAIGHT TRUCK
MD 385ED33 · 1NPCX4EX6TD787547
0 — No
86223651 Oct 31, 2025 PA 2 —
PETERBILT STRAIGHT TRUCK
MD 276ED04 · 1NPTX4EX3MD762204
2 393.9A-LHLI, 393.22B-LPL No
Recent Crashes (9 rows)
Report # Date ▼ State Fatalities Injuries Tow Hazmat Severity
MD26A1332183 Jan 29, 2026 MD 0 1 Yes No Injury
DE0125024335 Mar 26, 2025 DE 0 0 Yes No Tow
DE0324021439 Apr 24, 2024 DE 0 0 Yes No Tow
PA310157100X Oct 24, 2023 PA 0 1 Yes No Injury
PA201524400X Feb 2, 2022 PA 0 0 Yes No Tow
PA000939300X Jan 23, 2020 PA 0 0 Yes No Tow
MD18A0526933 Nov 28, 2018 MD 0 0 Yes No Tow
MD17A0316174 Feb 27, 2017 MD 0 1 Yes No Injury
DE0316075130 Dec 9, 2016 DE 0 0 Yes No Tow
Authority Records (1 docket)
common
MC918498
Active
—
View full authority record →
MC Certificate Documents (2 PDFs)

Authority Records (above) are FMCSA docket status and lifecycle events. MC Certificate Documents here are the archived PDF letters for each action — grants, reinstatements, revocations, name changes, and transfers. They are related but not the same dataset: one row per PDF letter, not one file per docket.

Click a row to open that specific letter. Multiple letters per docket are listed separately by action type and date.

Date Docket Action Authority PDF
Jun 17, 2020 MC918498-C REI REINSTATEMENT REI →
Sep 15, 2015 MC918498-C CPL CERTIFICATE CPL →
Insurance Coverage Timeline (4 rows)

Every insurance policy on file, newest effective date first. Amber rows mark BIPD/Primary coverage gaps.

Insurer Policy # Type Limit Effective Cancel Status
ZURICH AMERICAN INSURANCE COMPANY TRK 6152983 91X $750,000 Jan 1, 2025 On file ACTIVE
THE TRAVELERS INDEMNITY CO. OF CONNECTICUT 8P615766 BIPD/Primary — Jun 1, 2020 Jan 1, 2025 REPLACED
TRAVELERS PROPERTY CASUALTY CO. OF AMERICA 0L248643 BIPD/Primary — Jun 1, 2018 Jun 1, 2020 CANCELLED
ERIE INSURANCE EXCHANGE Q06 0140517 BIPD/Primary — Jul 7, 2015 Jun 1, 2018 CANCELLED
Compliance Timeline Merged authority / insurance / enforcement events
  1. Jan 1, 2025
    insurance
    TERM/REPL — THE TRAVELERS INDEMNITY CO. OF CONNECTICUT
  2. Jun 17, 2020
    authority
    REINSTATED — MOTOR PROPERTY COMMON CARRIER
    Details →
  3. Jun 8, 2020
    authority
    REVOKED — MOTOR PROPERTY COMMON CARRIER
    Details →
  4. Jun 8, 2020
    authority
    Authority revoked — INVOLUNTARY REVOCATION
  5. Jun 1, 2020
    insurance
    CANCEL — TRAVELERS PROPERTY CASUALTY CO. OF AMERICA
  6. Jun 1, 2018
    insurance
    CANCEL — ERIE INSURANCE EXCHANGE
  7. May 31, 2018
    authority
    DISCONTINUED REVOCATION — COMMON
    Details →
Top Stations & Violation Codes Where this carrier gets inspected and what they get cited for

Most-Inspected Stations

Station State Inspections OOS
CECILTON SCALE HOUSE MD 18 0
QUEEN ANNES COUNTY MD 15 0
WARWICK MD MD 9 0
KENT COUNTY MD 8 1
CECIL COUNTY MD 6 0
ANNAPOLIS MD MD 5 0
CENTREVILLE MD MD 5 0
HARRINGTON DE DE 3 0
FREDERICK MD MD 3 0
QUEEN ANNE MD MD 3 0

Top Violation Codes Cited

Code Description Category Cited OOS
392.2 Violation of Local Laws - Explain: Unsafe Driving 23 0
392.16(a) Failing to use seat belt (49 CFR) Unsafe Driving 2 0
383.51(a) Driving a CMV while disqualified from holding a CDL Driver Fitness 1 1
390.21(b) Carrier name and/or USDOT Number not displayed as required General/Admin 1 0
393.100(b) Leaking/spilling/blowing/falling cargo Vehicle Maintenance 1 1
393.203 Cab/body parts requirements violations Vehicle Maintenance 1 0
393.45(b)(2) Brake hose or tubing chafing and/or kinking Vehicle Maintenance 1 0
393.45(d) Brake connections with leaks or constrictions Vehicle Maintenance 1 0
393.75(a)(3) Tire-flat and/or audible air leak Vehicle Maintenance 1 1
393.78 Wipers - Inoperative / missing / damaged wipers. Vehicle Maintenance 1 0
Related Records Cross-references to every adjacent page
Directory
Authority Records
Insurance Carriers
Process Agent (BOC-3)
Carrier Records
Discover
Explainers

How to verify BYLER TRUCKING SERVICES LLC

  1. Verify USDOT and MC numbers match the carrier's documents. Compare the USDOT number and MC docket on this page to the numbers on the carrier's invoice, rate confirmation, or load-board listing. A mismatch between the carrier's claimed numbers and the registered legal name is the single most common red flag.
  2. Check active operating authority and insurance status. Confirm the Authority Records show at least one ACTIVE docket for the type of operation you're booking, and that the Active Insurance card lists a current BIPD/Primary policy. A revoked authority or uninsured carrier cannot legally operate.
  3. Review safety rating and SMS BASIC scores. Check the carrier's FMCSA safety rating (if any) and the SMS BASIC table. A high percentile in any BASIC category — especially Unsafe Driving, HOS, or Vehicle Maintenance — is worth investigating before tendering a load.
  4. Examine inspection and crash history. Open the Inspection History and Crash History subpages for the full record. Look for patterns: repeat OOS findings on the same unit, multiple crashes in a short window, or violations clustered in one BASIC category.
  5. Cross-reference real-time data with FMCSA SAFER. For the most current snapshot — within 24 hours of any insurer filing or authority change — click through to the FMCSA SAFER lookup. TruckCodex mirrors SAFER and L&I daily; SAFER itself reflects filings within 24 hours.

Frequently asked questions about BYLER TRUCKING SERVICES LLC

Is BYLER TRUCKING SERVICES LLC an active motor carrier? ▾
Yes. BYLER TRUCKING SERVICES LLC is registered with the FMCSA under USDOT 2637059 and is currently shown as Active in the agency's Motor Carrier Management Information System (MCMIS). Active status means the carrier may legally operate, contingent on continuous insurance and authority filings.
What is BYLER TRUCKING SERVICES LLC's safety rating? ▾
BYLER TRUCKING SERVICES LLC's FMCSA safety rating is Conditional. A Conditional rating indicates the carrier did not meet the safety fitness standard during its most recent compliance review and is on notice to remediate. Safety ratings are assigned only after a formal compliance review; most carriers in the FMCSA database are unrated.
How many inspections has BYLER TRUCKING SERVICES LLC had? ▾
134 roadside inspections are on file for BYLER TRUCKING SERVICES LLC in FMCSA's MCMIS database. Each inspection is summarized in the Inspection History section below — sortable by date, state, level, and out-of-service result. Newer inspections are pulled from the FMCSA SMS data feed daily.
What is BYLER TRUCKING SERVICES LLC's out-of-service rate? ▾
BYLER TRUCKING SERVICES LLC has no out-of-service findings on its inspection record. Across 134 inspections, no driver or vehicle has been placed out of service — a clean record relative to the national averages of roughly 6.7% (driver) and 23.4% (vehicle).
Where is BYLER TRUCKING SERVICES LLC based? ▾
BYLER TRUCKING SERVICES LLC reports its physical address to the FMCSA as 1120 MERRICK CORNER ROAD, INGLESIDE, Maryland 21644. Carriers must file a Form MCS-150 every two years to keep their address current; an outdated address is a common compliance flag.
Does BYLER TRUCKING SERVICES LLC have valid operating authority? ▾
Yes. BYLER TRUCKING SERVICES LLC holds 1 active FMCSA operating authority (MC918498). Each docket appears in the Authority Records section below with its full event history. Active authority means the carrier may legally operate as a for-hire carrier, contingent on current insurance and BOC-3 process-agent filings.
How many trucks and drivers does BYLER TRUCKING SERVICES LLC operate? ▾
BYLER TRUCKING SERVICES LLC self-reports 27 power units and 21 drivers on its most recent FMCSA Form MCS-150 filing. Power-unit and driver counts come from the carrier directly and are required to be updated every two years; very large fluctuations between filings can indicate fleet changes worth investigating.
Has BYLER TRUCKING SERVICES LLC had any crashes? ▾
9 FMCSA-reportable crashes are on file for BYLER TRUCKING SERVICES LLC in MCMIS. A reportable crash is one resulting in a fatality, an injury requiring transport for medical attention, or a vehicle disabled and towed from the scene. The full crash log is on the Crashes subpage with date, state, and outcome details.

About FMCSA carrier records

Every commercial motor carrier operating in the United States is required to register with the Federal Motor Carrier Safety Administration (FMCSA) and obtain a USDOT number. The USDOT number is a permanent, unique identifier — once assigned, it stays with the carrier for life and is never reissued to another company. Carriers must update their registration every two years on Form MCS-150 to keep their address, fleet size, and operating data current.

Carrier safety data lives in FMCSA's Motor Carrier Management Information System (MCMIS): roadside inspections, crashes, out-of-service findings, and the seven Behavior Analysis and Safety Improvement Categories (BASICs) that make up the SMS scoring methodology. For-hire carriers must also hold operating authority — an MC, FF, or MX docket number — which is separate from the USDOT number and requires continuous insurance and BOC-3 process-agent filings to remain active.

TruckCodex mirrors FMCSA's public SAFER and L&I systems on a daily refresh cycle. Every record on this page reflects what FMCSA has on file. We do not edit or modify carrier data — for real-time confirmation immediately before a transaction, click through to the FMCSA SAFER lookup linked in the related records section above. Safety ratings, when present, come from formal compliance reviews; most active carriers have not been reviewed and are correctly listed as unrated.

Data sources & freshness

TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.

FMCSA

Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.

Refreshed daily.
NHTSA

Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).

Refreshed daily.
EIA

Retail diesel and gasoline price history and state fuel-tax tables.

Refreshed weekly.
Transport Canada

Cross-border carrier registry and Canadian recall campaigns where applicable.

Refreshed weekly.

TruckCodex is an independent aggregator; it is not affiliated with FMCSA, NHTSA, EIA, or Transport Canada. Always verify compliance-critical information directly with the originating agency.