Carrier profile · USDOT 6789 · Updated Aug 20, 2026

Thos Somerville Co

77 power unitsavg 2.9 yrMulti-region · 8 statesUPPER MARLBORO, MD84/100

AUTHORITY STATUS UNKNOWNRATED SATISFACTORYHAZMAT

Observed fleet · trailing 24 mo daily

77Power units

51 observed · MCS-150

—Trailers seen

None observed · 24 mo

2.9Avg age (yr)

2017–2026 · vPIC

Call dispatch(301) 390-9575 Email dispatchshirley

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Load decision · FMCSA snapshot · Aug 20, 2026

Review before loading

Operating, but with flags a broker should weigh before tendering freight.

Watch · 2

Fatal crash on record1 crash(es) involving a fatality are on this carrier's record.MCS-150 update dueThe biennial MCS-150 update is overdue.

In good standing · 2

Established 52 yearsOperating authority has been on file since 1974.Out-of-service rates below national averageBoth vehicle and driver OOS rates beat the national benchmark across 131 inspections.

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo8.0%

▼ 22.26% nat'l

Crashes · fatal

1 in 24 mo

USDOT registration

yr registered

Authority not on file

Insurance (BIPD)— unknown

No filing on record

Vehicle OOS · 24-mo8.0%

▼ 22.26% nat'l

Crashes · fatal

1 in 24 mo

Vektor intelligence · beyond the federal recordProprietary signals computed from VIN-decoded inspections & daily FMCSA snapshots

Fleet typeIdentity

Asset-based

77 power units. Brokers price each fleet type apart.

Fleet age vs peersNewer

2.9 yr

Model years 2017–2026 · peer benchmark unavailable.

Identity stabilityStable

52 yr unchanged

Same registration since 1974 — no chameleon / reincarnation signal.

Safety

94 inspections · 24 mo · vs national benchmarks

Out-of-service rate· 24-mo cumulative · vs national

Vehicle OOS 8.0%24-mo cumulative

050%nat'l 22.26%

Driver OOS 3.2%24-mo cumulative

030%nat'l 6.67%

Every inspection in the window pooled — 75 vehicle and 94 driver inspections over 24 months.

Vehicle OOS rate· vehicle OOS · vehicle-level inspections · 6-month trailing

13.3% · latest 6-mo window● Steady

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Holding steady across the window. The national vehicle benchmark uses the same metric and is shown on the chart.

Roadside inspection history· 24 charted calendar months · vehicle / driver level · any-OOS overlay

93 inspections in the charted months · busiest month Dec '24 · 10

Vehicle-levelDriver-levelAny OOS

Monthly FMCSA roadside inspections across the 24 charted calendar months. Bars show level-qualified vehicle and driver populations; one inspection can qualify for both. The line shows inspections with any out-of-service result.

Inspection coverage· expected vs observed · the fraud signal

Inspection coverage

How heavily FMCSA inspects this fleet for its size — it tells you how much to trust the safety signals above. Thin coverage on a young authority is a fraud signal nobody else surfaces.

Expected band

Under-inspected

Expected

Well-monitored

Heavily inspected

≈0.6 / unit·yr

thin signalabundant signal

Roadside-inspection volume is about what you'd expect for a 77-unit fleet — enough signal to read the safety record, though not a heavy sample.

Registered power units: 77
Inspections · 24 mo: 94
Annualized: ≈47 / yr
Coverage: ≈0.6 inspections / unit · yr

Violation themes· decoded · grouped by BASIC

What this carrier actually gets cited for — FMCSA violation codes decoded into plain English, ranked by frequency.

392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving21 · 0 OOS
393.9 Inoperative required lampsVehicle Maintenance19 · 3 OOS
391.41 No / expired medical certificateDriver Fitness7 · 3 OOS
390.21 USDOT number marking on vehicleUnsafe Driving6 · 0 OOS
396.3 Inspection / repair / maintenance not performedVehicle Maintenance3 · 3 OOS
392.82 Using a hand-held mobile phoneUnsafe Driving3 · 0 OOS
392.16 Failure to use seat beltUnsafe Driving3 · 0 OOS
396.17 Periodic (annual) inspectionVehicle Maintenance3 · 0 OOS
393.47 Brake actuators / linings / componentsVehicle Maintenance3 · 0 OOS
393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance3 · 0 OOS

Explore full safety record — inspections, BASICs, crashes

Authority & Insurance

Can they legally + adequately haul your load?

Insurance continuity· insurer · policy · lapses

No insurance filing history on record.

This timeline is the FMCSA filing history, and it ends at the most recent superseded filing — current policy status is not tracked here. Request a certificate of insurance to confirm active coverage before tendering.

Explore full authority & insurance record

Equipment

VIN-decoded · NHTSA vPIC

Capacity· power units = haulable capacity; trailers are towed

Registered power units (MCS-150): 77
Observed power (24 mo): 51
Trailers (towed): 0

Capacity is power units only — trailers are towed equipment and are never summed into a fleet-size figure.

Fleet age· model years · decoded VINs

2.9 yr

Average age

2026

Newest model yr

2017

Oldest model yr

47.1%

VINs decoded

Explore full fleet — VIN roster, equipment mix, age distribution

Operations & Lanes

Revealed by inspection density across 8 states · 24 mo

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional

revealed

States observed

US states

Inspections · 24 mo

MD busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base

UPPER MARLBORO, MD

16155 TRADE ZONE AVENUE

Top corridor

MD 60 · PA 16 · DE 5

Density

fewermore

Shade = roadside inspections, last 24 mo.

See the full operating map — state density, top lanes

Network & Fraud

Affiliated entities & reincarnation signals · for review, not a verdict

No shared-VIN flow in the last 12 months

None of this carrier's trucks were inspected under another USDOT in the last 12 months — any shared equipment is historical, not active.

Show all-time history (7 trucks · 7 carriers)

Across all inspections on record: USDOT 3883187 USDOT 3532893 USDOT 4345610 USDOT 1459681 USDOT 925129 USDOT 3109624 USDOT 2109578

Capacity consistency· registered vs roadside-observed power units

Registered (MCS-150)

Observed (24 mo)

Shared w/ other carriers

Registered capacity materially exceeds what is observed roadside — the MCS-150 may be stale or the fleet under-utilized.

Explore the carrier network & VIN cross-links

Identity & Federal

FMCSA census + L&I dossier

Location

Physical address: 16155 TRADE ZONE AVENUE, UPPER MARLBORO, MD, 20774
Operation: Interstate· Hazmat

Contact

Phone: (301) 390-9575
Fax: (301) 390-1108
Email: shirley

Registration

Officers: Michael Leisher · Doug Riley
USDOT / docket: 6789
First registered: Jun 1, 1974
Last MCS-150: Jul 16, 2024 · 1,442,748 mi (2023)
FMCSA safety rating: Satisfactory · Feb 25, 2008
D-U-N-S: 3242781

Fleet (self-reported · MCS-150)

Power units

Drivers

CDL drivers

1,442,748

Annual mileage

Open the full identity & federal record

Federal activity

Daily-captured FMCSA licensing & insurance changes — monitored by Vektor

Federal record activity· monitored daily by Vektor

No licensing or insurance changes captured since Vektor began monitoring this carrier (June 2026). Quiet is usually good.

Open the full federal-record activity feed

Reviews

Verified broker, shipper & driver reviews — moderated

Performance ratings only — never the Vektor risk score

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Verification summaryAuthority, insurance, safety and identity facts for THOS SOMERVILLE CO.

THOS SOMERVILLE CO (USDOT 6789) has a Vektor safety score of 84/100 and a Review before loading verdict, from the carrier's FMCSA record refreshed Aug 20, 2026.

The carrier has an unknown current for-hire authority status because no FMCSA L&I authority row is available as of Aug 20, 2026.

It has an unknown current BIPD insurance status because no FMCSA L&I active-filing snapshot is available as of Aug 20, 2026.

Its vehicle out-of-service rate was 8.0% over the last 24 months, versus the 22.26% CVSA national average, from FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier received 94 roadside inspections in the last 24 months — 75 vehicle-level and 94 driver-level — across 8 states, according to FMCSA roadside-inspection data refreshed Aug 20, 2026.

The carrier has 1 reportable crash in the last 24 months and 1 fatal crash across the full FMCSA crash record available as of Aug 20, 2026.

It reports 77 power units and 77 drivers in its most recent MCS-150 filing dated Jul 16, 2024.

It has an FMCSA safety rating of Satisfactory assigned Feb 25, 2008 in the federal record refreshed Aug 20, 2026.

Frequently asked

What is THOS SOMERVILLE CO's USDOT number?

THOS SOMERVILLE CO's USDOT number is 6789.

Is THOS SOMERVILLE CO authorized to operate?

As of Aug 20, 2026, THOS SOMERVILLE CO is active in the FMCSA register.

What is THOS SOMERVILLE CO's safety record?

THOS SOMERVILLE CO has a 8.0% vehicle out-of-service rate (national average 22.26%) across 131 roadside inspections, with 1 reportable crash in the last 24 months, and an FMCSA "Satisfactory" safety rating. Vektor's computed risk score is 84/100 (tier: review).

How big is THOS SOMERVILLE CO's fleet?

THOS SOMERVILLE CO operates 77 power units and 77 drivers per its most recent MCS-150 filing.

Where is THOS SOMERVILLE CO based?

THOS SOMERVILLE CO is based in UPPER MARLBORO, MD, with roadside inspections recorded across 8 states.

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