Commercial Rock Co Inc is an active intrastate non-hazmat carrier based in Upland, CA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 51 | 0 | 0 |
| Tractors | 51 | 0 | 0 |
| Trailers | 78 | 0 | 0 |
| Total Power Units | 51 | ||
Distinct vehicles · 24 mo
vs 51 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 60% | 93% | Around peer average |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 76% | 89% | Worse than most peers |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 1 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Jan 1, 2026 | 0 | 0 | 2 | 2 |
| Jan 1, 2025 | 0 | 1 | 1 | 1 |
| Oct 1, 2024 | 0 | 0 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 20 | 4 | 4 |
| Unsafe Driving |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Jan 15, 2026 | CA | TRUCK TRACTOR | 0 | 0 |
| Dec 4, 2025 | CA | TRUCK TRACTOR | 0 | 0 |
| Aug 18, 2025 | CA | TRUCK TRACTOR | 0 | 0 |
| Jul 18, 2025 | CA | TRUCK TRACTOR | 4 | 1 |
| Jun 4, 2025 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 2 | 0.15 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 8 | 3.51 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 1 state. Top state CA accounts for 100% of activity. Activity outside home state (CA): 0%.
| 2 |
| 1 |
| 0 |
| CA |
| TRUCK TRACTOR |
| 0 |
| 0 |
| Jan 24, 2025 | CA | TRUCK TRACTOR | 0 | 0 |
| Jan 14, 2025 | CA | TRUCK TRACTOR | 0 | 0 |
| Oct 4, 2024 | CA | TRUCK TRACTOR | 0 | 0 |
| Oct 4, 2024 | CA | TRUCK TRACTOR | 0 | 0 |
| Sep 4, 2024 | CA | TRUCK TRACTOR | 2 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Jul 18, 2025 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |
| Jul 18, 2025 | 39355EB | Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1 1998 | Vehicle Maintenance | — |
| Jul 18, 2025 | 39375A3TAOL | Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS | Vehicle Maintenance | Yes |
| Jul 18, 2025 | 3965BL | Lubrication - Oil or grease leak | Vehicle Maintenance | — |
| Sep 4, 2024 | 39345B2 | Brake hose or tubing chafing and/or kinking | Vehicle Maintenance | — |
| Sep 4, 2024 | 3965B | Oil and/or grease leak | Vehicle Maintenance | — |
| Sep 4, 2024 | 393201A | Frame cracked / loose / sagging / broken | Vehicle Maintenance | — |
| Sep 4, 2024 | 3965A | Failing to ensure that vehicle is properly lubricated | Vehicle Maintenance | — |
| Sep 4, 2024 | 3965B | Oil and/or grease leak | Vehicle Maintenance | — |
| Sep 4, 2024 | 3939T | Inoperable tail lamp | Vehicle Maintenance | — |