Carrier profile · USDOT 227340 · MC-407667 · Updated Jun 13, 2026

William N Mason Inc

15 power unitsavg 16.9 yrRegional · 6 statesBALTIMORE, MD87/100
CARRIER ACTIVEMC-407667 ACTIVERATED SATISFACTORYHAZMAT
Verified linksmasoninc.comFMCSA SAFER

Safety

Roadside out-of-service rates versus the national benchmark, inspection and crash trends, decoded violation themes, and ELD / hours-of-service integrity — the full safety picture behind the verdict.

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

Vehicle OOS 23.1%24-mo cumulative
050%nat'l 22.26%
Driver OOS 4.8%24-mo cumulative
030%nat'l 6.67%

Every inspection in the window pooled — 13 vehicle and 21 driver inspections over 24 months.

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

40.0% · latest 6-mo window▼ Falling

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending down 5.8 pts 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

20 inspections in the charted months · busiest month Mar '25 · 3

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
≈0.7 / unit·yr
thin signalabundant signal
Roadside-inspection volume is about what you'd expect for a 15-unit fleet — enough signal to read the safety record, though not a heavy sample.
Registered power units
15
Inspections · 24 mo
21
Annualized
≈11 / yr
Coverage
≈0.7 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

38%
Unsafe Driving
Vektor peer est.
Hours-of-Service
.68measure
SMS · per-BASIC
Driver Fitness
0violations
clean · per-BASIC
Controlled Substances
0violations
clean · per-BASIC
61%
Vehicle Maintenance
Vektor peer est.

Percentile = standing among same-exposure peers (higher = worse). FMCSA publishes percentiles for only some carriers (shown official); elsewhere we show a Vektor peer-percentile estimate, or the absolute SMS measure when there are too few inspections to rank.

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 Driving11 · 0 OOS
  • 393.9 Inoperative required lampsVehicle Maintenance7 · 1 OOS
  • 393.45 Brake tubing / hose defectsVehicle Maintenance3 · 0 OOS
  • 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance3 · 1 OOS
  • 395.8 Record of duty status (log / ELD) not current or missingHOS Compliance3 · 1 OOS
  • 393.78 Windshield wipersVehicle Maintenance2 · 0 OOS
  • 396.5 Oil and/or grease leakVehicle Maintenance2 · 0 OOS
  • 392.16 Failure to use seat beltUnsafe Driving2 · 0 OOS
  • 393.81 HornVehicle Maintenance1 · 0 OOS
  • 393.93 Parts & accessories (vehicle condition)Vehicle Maintenance1 · 0 OOS

ELD & hours-of-service

3 hours-of-service / ELD violations on record · most recent May 15, 2026. FMCSA does not publish the ELD device brand; these are the carrier's logging-compliance signals.

1ELD device issues
3No log / no ELD
0False logs
0Drove over hours

Trending worse — 100% of ELD violations are in the last 24 months.

Crash history· 27 total · 2 in 24 mo

27
Total crashes
2
In last 24 mo
0
Fatal
9
Injury
YearCrashesFatalInjuryTow
20251001
20241001
20231001
20202012
20191001
20181001
20174014
20163023
20151001
20141001
20131001
20103003
20082022
20071011
20062011
20001011
19961001
DateStateFatalitiesInjuriesTow-away
Oct 23, 2025VA00Yes
Oct 18, 2024NC00Yes
Jul 24, 2023MD00Yes
Sep 24, 2020MD00Yes
Jan 24, 2020MD01Yes
May 24, 2019MD00Yes
Aug 10, 2018VA00Yes
Oct 5, 2017MD00Yes
Sep 21, 2017VA00Yes
Jul 11, 2017VA02Yes
Jan 16, 2017MD00Yes
Aug 19, 2016MD00Yes
May 25, 2016MD01Yes
Feb 3, 2016MD02Yes
Dec 17, 2015MD00Yes
Jun 4, 2014VA00Yes
Sep 20, 2013MD00Yes
Dec 28, 2010MD00Yes
Nov 23, 2010VA00Yes
Nov 6, 2010VA00Yes
Aug 21, 2008VA01Yes
May 9, 2008MD01Yes
Jul 29, 2007MD02Yes
May 1, 2006DE00Yes
Jan 12, 2006VA01No