Carrier profile · USDOT 1705039 · Updated Jun 13, 2026

MATERIAL DELIVERY INC

DBA MDI ROCK

40 power unitsavg 13.9 yrLocal · 1 statesPHOENIX, AZ74/100
AUTHORITY STATUS UNKNOWN
Verified linksmdfrock.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 71.4%24-mo cumulative
050%nat'l 22.26%
Driver OOS 6.7%24-mo cumulative
030%nat'l 6.67%

Every inspection in the window pooled — 14 vehicle and 15 driver inspections over 24 months.

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

72.7% · latest 6-mo window▲ Rising

Share of vehicle-level roadside inspections in each trailing six-month window that resulted in a vehicle out-of-service order. Trending up 24.5 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

12 inspections in the charted months · busiest month Dec '24 · 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.

Thin coverage
Under-inspected
Expected
Well-monitored
Heavily inspected
≈0.2 / unit·yr
thin signalabundant signal
Few roadside inspections for a 40-unit fleet — the out-of-service and violation signals above rest on a small sample, so weight them cautiously. Thin coverage on a young authority is itself a flag.
Registered power units
40
Inspections · 24 mo
15
Annualized
≈8 / yr
Coverage
≈0.2 inspections / unit · yr

BASIC categories· CSA SMS · Aug 2026

14%
Unsafe Driving
Vektor peer est.
Hours-of-Service
0violations
clean · per-BASIC
13%
Driver Fitness
Vektor peer est.
Controlled Substances
0violations
clean · per-BASIC
94%
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.

  • 393.9 Inoperative required lampsVehicle Maintenance21 · 3 OOS
  • 393.45 Brake tubing / hose defectsVehicle Maintenance15 · 6 OOS
  • 396.3 Inspection / repair / maintenance not performedVehicle Maintenance15 · 10 OOS
  • 393.75 Tires (defective / underinflated / worn)Vehicle Maintenance10 · 10 OOS
  • 393.47 Brake actuators / linings / componentsVehicle Maintenance9 · 0 OOS
  • 393.11 Required lamps/reflectors missingVehicle Maintenance6 · 0 OOS
  • 393.78 Windshield wipersVehicle Maintenance6 · 0 OOS
  • 393.95 Emergency equipment (extinguisher, triangles)Vehicle Maintenance5 · 0 OOS
  • 393.53 Automatic brake adjusters / indicatorsVehicle Maintenance5 · 0 OOS
  • 392.2 State/local traffic law violation (speeding, etc.)Unsafe Driving5 · 0 OOS

ELD & hours-of-service

No hours-of-service or ELD violations on record across 27 inspections — a clean logging history.

Crash history· 18 total · 2 in 24 mo

18
Total crashes
2
In last 24 mo
1
Fatal
2
Injury
YearCrashesFatalInjuryTow
20261001
20242012
20232002
20221001
20211001
20202002
20191001
20182002
20171001
20161001
20151001
20063113
DateStateFatalitiesInjuriesTow-away
Apr 3, 2026AZ00Yes
Oct 3, 2024AZ01Yes
Mar 7, 2024AZ00Yes
Dec 27, 2023AZ00Yes
Jul 24, 2023AZ00Yes
Jun 28, 2022AZ00Yes
Apr 23, 2021AZ00Yes
Dec 10, 2020AZ00Yes
Jan 17, 2020AZ00Yes
Jul 9, 2019AZ00Yes
Sep 12, 2018AZ00Yes
Jan 4, 2018AZ00Yes
May 23, 2017AZ00Yes
Oct 3, 2016AZ00Yes
Dec 18, 2015AZ00Yes
Dec 28, 2006AZ00Yes
Feb 15, 2006AZ12Yes
Jan 20, 2006AZ00Yes