DBA: J & R Trucking
Jerry Diemoz is an active interstate carrier based in Rock Springs, WY.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 3 | 0 | 0 |
| Tractors | 33 | 0 | 0 |
| Trailers | 65 | 0 | 0 |
| Total Power Units | 36 | ||
Distinct vehicles · 24 mo
vs 36 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 | 78% | 96% | Worse than most peers |
| HOS Compliance | 67% | 95% | Around peer average |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 39% | 89% | Around peer average |
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 |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 12 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Sep 1, 2026 | WY | TRUCK TRACTOR | 1 | 0 |
| Aug 13, 2026 | ND | TRUCK TRACTOR | 0 | 0 |
| Aug 13, 2026 | WY | TRUCK TRACTOR | 2 | 0 |
| Apr 21, 2026 | WY | TRUCK TRACTOR | 1 | 1 |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 2 | 0.74 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 4 | 3.12 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 5 states. Top state WY accounts for 59% of activity. Activity outside home state (WY): 41%.
| 3 |
| 4 |
| Unsafe Driving | 2 | 0 | 0 |
| Hours-of-Service Compliance | 1 | 0 | 0 |
| Mar 20, 2026 |
| MT |
| TRUCK TRACTOR |
| 0 |
| 0 |
| Jan 5, 2026 | ND | TRUCK TRACTOR | 1 | 0 |
| Dec 18, 2025 | WY | TRUCK TRACTOR | 0 | 0 |
| Mar 17, 2025 | WY | STRAIGHT TRUCK | 0 | 0 |
| Mar 17, 2025 | WY | STRAIGHT TRUCK | 0 | 0 |
| Mar 17, 2025 | WY | STRAIGHT TRUCK | 1 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Sep 1, 2026 | 3922SLLTCD | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign light lane marking other | Unsafe Driving | — |
| Aug 13, 2026 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |
| Aug 13, 2026 | 39378AWS | Washers - Inoperative washing system. | Vehicle Maintenance | — |
| Apr 21, 2026 | 393130CCHVE | Heavy Vehicles/Equipment - Improper securement of heavy vehicles equipment or machinery with crawler tracks or wheels | Vehicle Maintenance | Yes |
| Jan 5, 2026 | 3922SLLS2 | State/Local Laws - Speeding 6-10 miles per hour over the speed limit | Unsafe Driving | — |
| Mar 17, 2025 | 39345B2BHTD | Air Brake - Hose/tubing damage into the outer reinforcement ply. | Vehicle Maintenance | — |
| Mar 17, 2025 | 39355BB | Hydraulic Brake - ABS malfunction lamp defective on truck/bus manufactured on or after March 1 1999 | Vehicle Maintenance | — |
| Jun 6, 2024 | 39375C | Tire-other tread depth less than 2/32 of inch measured in a major tread groove | Vehicle Maintenance | — |
| Jun 6, 2024 | 39375COOS | Tire-other tread depth less than 1/32 of inch measured in 2 adjacent major tread grooves 3 separate locations 8 inches apart | Vehicle Maintenance | Yes |
| Apr 28, 2024 | 39345B2 | Brake hose or tubing chafing and/or kinking | Vehicle Maintenance | Yes |