ROBERTSON'S READY MIX LTD
1,239-unit tanker operator based in Corona, CA. Current peer-cohort grade: A (strong).
- USDOT
- 256299
- MC
- MC1040325
- Based
- Corona, CA
- Contact
- 9516854600 · hr@rrmca.com
What this carrier is
With 1,239 power units and 1,239 drivers on file, ROBERTSON'S READY MIX LTD is an enterprise-fleet tanker operator operating out of Corona, CA. The carrier runs local lanes and holds active MC1040325 authority. Listed cargo classifications include liquids and gases and other: concrete. FMCSA safety rating on file: Satisfactory (Feb 1, 1989).
Fleet composition on file: 84 owned trucks, 806 owned tractors, 14 owned trailers, 185 term-leased tractors.
For shippers and brokers: this carrier reads as low-risk on peer-cohort measures with no acute or critical flags in the current window.
At a glance
Safety record
Grade shown here is ProHRHQ analysis based on public FMCSA data. It is not an official FMCSA safety rating. The authoritative federal record is on FMCSA SAFER/SMS.
Current peer-cohort snapshot based on public FMCSA BASIC measures. Peer cohort: 26 motor carriers operating 1,216–1,279 power units.
No acute or critical violation flags in the current review window.
The strongest signal is Driver Fitness at 0.0% of peer cohort average — well under norm. Combined with a clean acute-flag picture, that supports the A grade. Main caution: nothing stands out as disqualifying on this record.
| BASIC | Carrier (3yr, weighted) | Cohort avg | vs. cohort | Acute |
|---|---|---|---|---|
| Unsafe Driving | 114 | 121.00 | 94.2% | No |
| Hours-of-Service | 2 | 45.50 | 4.4% | No |
| Driver Fitness | 0 | 2.50 | 0.0% | No |
| Controlled Substances/Alcohol | 0 | 0.00 | — | No |
| Vehicle Maintenance | 223 | 250.00 | 89.2% | No |
| Hazmat | 0 | 0.00 | — | n/a |
Against similarly sized 1,216–1,279-power-unit peers, this carrier is below cohort average in Unsafe Driving, Hours-of-Service, Driver Fitness, and Vehicle Maintenance.
Inspection and violation record
Last 3 years of public roadside history for USDOT 256299: 320 inspections across 3 states. Most recent inspection: Apr 1, 2026 in NV.
| BASIC | Violations (3 yr) |
|---|---|
| Unsafe Driving | 114 |
| Hours-of-Service | 2 |
| Driver Fitness | 1 |
| Vehicle Maintenance | 255 |
| Hazmat | 1 |
| Total violations | 385 (60 out-of-service) |
Crash record (3 yr): 32 reportable crashes , 15 with reported injuries . Most recent: Mar 12, 2026.
What this carrier likely fits
This is a tanker operator that runs local lanes, primarily intrastate, at an enterprise fleet scale, with liquids and gases, and other: concrete on the FMCSA cargo classification list. Tractor-heavy composition with limited trailer pool suggests live-load / live-unload work or reliance on shipper-supplied trailers.
Drawn from FMCSA-reported cargo classifications, route profile, and fleet composition. Not a substitute for direct confirmation of equipment and lane capability with the carrier.
Key takeaways
- Grade A (strong) against 26 peer carriers operating 1,216–1,279 power units.
- No acute or critical violation flags in the current review window.
- 189 inspections in the 24-month SMS window (5 driver OOS, 20 vehicle OOS).
- Three-year public record: 385 violations, 32 reportable crashes.
- Driver Fitness is the strongest area — 0.0% of peer cohort average (well under norm).
- Operates as an enterprise-fleet tanker operator running local lanes with 1,239 power units on file.
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