S B Cox Ready Mix Inc is an active intrastate non-hazmat carrier based in Rockville, VA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 75 | 0 | 0 |
| Tractors | 9 | 0 | 0 |
| Trailers | 12 | 0 | 0 |
| Total Power Units | 84 | ||
Distinct vehicles · 24 mo
vs 84 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 49% | 89% | Around peer average |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 79% | 93% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 79% | 88% | 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 | 2 | — | 6.67% |
| Vehicle | 0 | 4 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Oct 1, 2025 | 0 | 2 | 2 | 2 |
| Jul 1, 2024 | 0 | 0 | 2 | 2 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 18 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 20, 2026 | VA | TRUCK TRACTOR | 0 | 0 |
| Jan 7, 2026 | VA | STRAIGHT TRUCK | 0 | 0 |
| Nov 18, 2025 | VA | STRAIGHT TRUCK | 0 | 0 |
| Nov 6, 2025 | VA | STRAIGHT TRUCK | 1 | 0 |
| Oct 8, 2025 |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 2 | 0.13 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 7 | 5.93 | — |
| Driver Fitness | 3 | 0.44 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 1 state. Top state VA accounts for 100% of activity. Activity outside home state (VA): 0%.
| 1 |
| 4 |
| Driver Fitness | 3 | 1 | 2 |
| Unsafe Driving | 2 | 1 | 0 |
| VA |
| STRAIGHT TRUCK |
| 2 |
| 0 |
| Aug 29, 2025 | VA | STRAIGHT TRUCK | 4 | 1 |
| Aug 20, 2025 | VA | STRAIGHT TRUCK | 1 | 0 |
| Jul 22, 2025 | VA | STRAIGHT TRUCK | 0 | 0 |
| Jun 5, 2025 | VA | STRAIGHT TRUCK | 0 | 0 |
| Apr 21, 2025 | VA | STRAIGHT TRUCK | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Nov 6, 2025 | 39355C2B | Air Brake - CMV other than truck-tractor manufactured on or after March 1 1998 not equipped with an antilock brake system. System does not function or indicates | Vehicle Maintenance | — |
| Oct 8, 2025 | 39395A4EEUS | Emergency Equipment - Fire Extinguishers - unsecured | Vehicle Maintenance | — |
| Oct 8, 2025 | 39395B | Emergency Equipment - A power unit requiring fuses - missing a spare fuse for a required part or accessory (e.g. lamps required by 393.11 ABS lights or low air | Vehicle Maintenance | — |
| Aug 29, 2025 | 3939ALIL | Lighting - Identification lamp(s) inoperative | Vehicle Maintenance | — |
| Aug 29, 2025 | 3939ALLPL | Lighting - License plate lamp inoperative | Vehicle Maintenance | — |
| Aug 29, 2025 | 3939ALSML | Lighting - Side marker lamp(s) inoperative | Vehicle Maintenance | — |
| Aug 29, 2025 | 3939BLRLIWR | Lighting - Tail lamp - Both lamps on rearmost vehicle inoperative when required to be on | Vehicle Maintenance | Yes |
| Aug 20, 2025 | 39355D1B | Air Brake - ABS malfunction lamp defective on truck-tractor manufactured on or after March 1 1997 and each single unit CMV on or after 1998. | Vehicle Maintenance | — |
| Mar 3, 2025 | 39111B5LNCDLNVE | License - Endorsement - Operate a CMV without proper endorsement or in violation of restriction. NOTE: Other than a 391.41 violation. | Driver Fitness | Yes |
| Feb 28, 2025 | 39347E | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | Vehicle Maintenance | — |