S B Cox Ready Mix Inc
USDOT 2284804 · Rockville, Virginia · Intrastate (non-hazmat) for-hire carrier · 50–99 power units
S B Cox Ready Mix Inc is a company based in Rockville, Virginia, registered with the FMCSA as an intrastate (non-hazmat) carrier (private property, authorized for hire). It reports 84 power units and 56 drivers, which ranks it #71 by fleet size among 128 active for-hire carriers with 50+ power units headquartered in Virginia. In the 24 months to Sep 24, 2026 its trucks were inspected 27 times – about 0.3 inspections per power unit. 37.5% of vehicle inspections and 7.4% of driver inspections ended with an out-of-service order, against 20.5% and 3.3% for carriers of the same size nationally. FMCSA records 6 reportable crashes in the last 24 months (7 injuries, 0 fatalities, 6 tow-away), or 7.1 per 100 power units versus 4.8 for its size band. Crash counts in FMCSA data do not indicate fault. Its registered cargo types are motor vehicles, building materials, construction.
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Registration and contact
| Legal name | S B Cox Ready Mix Inc |
|---|---|
| DBA name | — |
| USDOT number | 2284804 |
| Operating authority (docket) | — |
| Entity type | Private Property, Authorized for Hire |
| Operation | Intrastate (non-hazmat) |
| Business type | — |
| Physical address | 2160 Lanier Lane, Rockville, VA 23146 |
| Phone | (804) 364-0500 |
| First registered | Mar 16, 2012 |
| Last MCS-150 update | Jan 7, 2026 |
| Hazmat carrier | No |
Check live authority, insurance and out-of-service status: FMCSA SAFER snapshot for USDOT 2284804.
Fleet and drivers
| Equipment | Owned | Term-leased | Trip-leased |
|---|---|---|---|
| Straight trucks | 75 | 0 | 0 |
| Truck tractors | 9 | 0 | 0 |
| Trailers | 12 | 0 | 0 |
- 0.67 drivers per power unit (national median for 50+ unit fleets: 0.99).
- 1.3 trailers per tractor.
- 1,143,658 miles reported for 2024 – about 13,615 miles per power unit vs a 38,151 median for 50–99-unit fleets.
- 100% of listed equipment is owned rather than leased.
- 56 CDL drivers; 0 drivers operate interstate beyond 100 miles, 0 within 100 miles.
Safety record
Roadside inspections Sep 25, 2024 – Sep 24, 2026; crashes Nov 1, 2024 – Oct 31, 2026. Benchmarks: 50–99-unit for-hire carriers nationally (5,500) and Virginia carriers with 50+ units (128).
| Measure | S B Cox Ready Mix Inc | Same size, US | VA average | |
|---|---|---|---|---|
| Small sample: fewer than 20 vehicle or driver inspections, so rates can swing a lot with one inspection. | ||||
| Vehicle out-of-service rate | 37.5% | 20.5% | 17.4% | 83% higher than average |
| Driver out-of-service rate | 7.4% | 3.3% | 1.5% | 122% higher than average |
| Crashes per 100 power units | 7.1 | 4.8 | 4.6 | 50% higher than average |
| Inspections | 27 | 27 with a driver check, 8 with a vehicle check, 19 BASIC violations recorded | ||
| FMCSA safety rating | Not rated – most carriers have never had a compliance review; this is not a negative finding. | |||
Cargo carried
Less common in this directory: motor vehicles (873 of 5,000 carriers).
Similar carriers in Virginia
Closest fleet size and cargo mix among Virginia carriers in this directory.
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| Santee Inc USDOT 621071 | Sterling | 86 | 43 | 56 | 13.2% | 5 |
| Meridian Waste Virginia LLC USDOT 1755080 | Petersburg | 82 | 75 | 31 | 55.0% | 5 |
| Gerdau Ameristeel US Inc USDOT 15802 | Roanoke | 89 | 65 | 64 | 41.0% | 6 |
| Branch Civil Inc USDOT 32509 | Roanoke | 90 | 87 | 47 | 9.5% | 6 |
| E F Thompson Inc USDOT 45687 | Fredericksburg | 74 | 82 | 20 | 20.0% | 7 |
| QCS Acquisition Corporation USDOT 3364177 | Salem | 104 | 130 | 12 | 25.0% | 0 |
Other carriers near Rockville
| Carrier | City | Power units | Drivers | Inspections (24 mo) | Vehicle OOS | Crashes (24 mo) |
|---|---|---|---|---|---|---|
| GFL of Virginia LLC USDOT 2055475 | West Point | 348 | 369 | 36 | 43.8% | 11 |
| The Wes Stewart Corporation USDOT 1194537 | Midlothian | 95 | 71 | 104 | 26.9% | 3 |
| C P Anderson Trucking Inc USDOT 743102 | Saluda | 71 | 57 | 63 | 20.6% | 4 |
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FAQ
What is the USDOT number of S B Cox Ready Mix Inc?
S B Cox Ready Mix Inc is registered with USDOT number 2284804.
How many trucks does S B Cox Ready Mix Inc have?
It reports 84 power units (9 tractors, 75 straight trucks) and 12 trailers, with 56 drivers, on its last MCS-150 update (Jan 7, 2026).
Where is S B Cox Ready Mix Inc located?
Its registered physical address is in Rockville, Virginia 23146.
What is the out-of-service rate of S B Cox Ready Mix Inc?
Over 24 months, 37.5% of vehicle inspections and 7.4% of driver inspections resulted in an out-of-service order (same-size national average: 20.5% vehicle, 3.3% driver).
Source: FMCSA Company Census File, SMS inspection file and Crash File (data.transportation.gov), refreshed 2026-11-04. Figures are as reported to FMCSA and may lag. How we calculate these numbers. Spotted an error? Carriers update their record with FMCSA via the MCS-150 form; see corrections.