RTS Financial
Fast funding for your trucking business.
Get a free quoteFMCSA Carrier Profile
S B COX READY MIX INC
Rockville, VA
CarrierChk vetting signal
No flags raised
Authority, insurance, safety rating and crash records checked
FMCSA status: Active registration · no operating authority · DOT 2284804
Active
No Safety Rating
Broker Vetting Summary
Key signals from current FMCSA records
Authority
No Active Authority
Common carrier
Insurance
Not Found
No coverage amount on file
Safety
Not Rated
18.5% OOS · 36 inspections on record
✓ No risk flags found on authority or insurance records
Vetting notes
- Active FMCSA registration, but no active for-hire operating authority on record
- No active insurance filing found on record
- Vehicle out-of-service rate 37.5% — above the 20.7% national average
- 36 FMCSA inspections on record
Company Information
Registration, contact and cargo details
FMCSA Registration
DOT Number
2284804
Safety Rating
Not Rated
Operation Classification
Authorized for hire, Private (property)
MCS-150 Filed
January 7, 2026
FMCSA Registration
March 16, 2012
Annual Mileage
1,143,658 mi (2024)
Contact Information
Address
2160 Lanier Lane, Rockville, VA 23146
Phone
Email
Owner / Officer
Morgan S. Nelson
Officer 2
S Barbee Cox Iii
Cargo Types
Motor VehiclesBuilding MaterialsConstruction Materials
Safety Snapshot
Out-of-service rates, violations and crashes
Safety & Inspection Summary
Total Inspections
36
Driver Inspections
27
Vehicle Inspections
11
Out-of-Service Violations
8
Violations by Category
Vehicle Maintenance28
Unsafe Driving2
Hours of Service0
OOS Rates vs. National Average
Driver OOS Rate10.0% · national avg 5.5%
⚠ Above national average (4.5pp higher)
Vehicle OOS Rate37.5% · national avg 20.7%
⚠ Above national average (16.8pp higher)
18.5% of 27 inspections in the last 24 months put a driver or vehicle out of service —
57th percentile among carriers with 25–99 inspections (lower is better).
CarrierChk calculation from FMCSA roadside inspection records, not an FMCSA score.
Inspection Trend by Year
2026
2025
2024
Violation Rate by Category
Share of roadside inspections in FMCSA's rolling 24-month window that found a violation in each category. The individual violations are listed under each inspection in Inspection Details below. None of this is the basis of the safety rating, which comes from an on-site compliance review.
Vehicle Maintenance
7 of 8 inspections
Unsafe Driving
0 of 27 inspections
Hours of Service
0 of 27 inspections
Driver Fitness
3 of 27 inspections
Controlled Substances
0 of 27 inspections
Crash History (5)
Crashes reported to FMCSA in the last 24 months. A crash appearing here is a reported event, not a finding of fault.
5
Crashes
0
Fatalities
3
Injuries
5
Tow-aways
| Date | State | Fatal | Injured | Tow | Conditions |
|---|---|---|---|---|---|
| June 22, 2026 | VA | — | 1 | Yes | No Adverse Conditions · Daylight · Dry |
| June 4, 2026 | VA | — | — | Yes | No Adverse Conditions · Daylight · Dry |
| November 4, 2025 | VA | — | 1 | Yes | No Adverse Conditions · Daylight · Dry |
| October 15, 2025 | VA | — | 1 | Yes | No Adverse Conditions · Daylight · Dry |
| September 18, 2024 | VA | — | — | Yes | Daylight · Wet |
Fleet & Operating Areas
Observed roadside activity and equipment
Where This Carrier Operates
States where this carrier's roadside inspections were recorded
FewerMore
VA30
Fleet & Equipment (25)
Vehicles identified in this carrier's inspection history. Year, make, model and equipment type are decoded from the VIN.
Power units
~23
of 84 reported to FMCSA
Trailers
~2
seen at inspection
Equipment types observed
Truck
19
Chassis / Incomplete
2
Tractor
2
Semi-trailer
1
Tank
1
Units on record
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| 2008 Mack GU (Granite) | Truck · Class 8 | 1M2AX04C18M003218 | 2 | 1 |
| 2016 Mack GU (Granite) | Truck · Class 8 | 1M2AX13C9GM060448 | 2 | — |
| 2023 Mack Granite | Truck · Class 8 | 1M2GR2NC5PM003817 | 2 | 1 |
| 2022 Mack Granite | Truck · Class 8 | 1M2GR2TC0NM001683 | 2 | — |
| 2021 Mack Granite | Truck · Class 8 | 1M2GR2TC2MM001358 | 2 | — |
| 2007 Volvo Truck VHD | Chassis / Incomplete · Class 8 | 4V5K99GH07N461016 | 2 | — |
| Unpublishe | Semi-trailer | 1A9AD2445XP432221 | 1 | — |
| 2001 International 4900 | Truck · Class 7 | 1HTSDAAN31H314082 | 1 | — |
| 2018 Mack CHU (Pinnacle) | Tractor · Class 8 | 1M1AN07Y6JM028316 | 1 | — |
| 2022 Mack Pinnacle | Tractor · Class 8 | 1M1PN4GY4NM009240 | 1 | — |
Show all 25 units
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| 2006 Mack CV (Granite) | Truck · Class 8 | 1M2AG11C06M051221 | 1 | 1 |
| 2006 Mack CV (Granite) | Truck · Class 8 | 1M2AG11C16M041460 | 1 | — |
| 2005 Mack CV (Granite) | Truck · Class 8 | 1M2AG11C75M023995 | 1 | — |
| 2007 Mack CV (Granite) | Truck · Class 8 | 1M2AG11C77M059785 | 1 | — |
| 2006 Mack CV (Granite) | Truck · Class 8 | 1M2AG11C96M037429 | 1 | — |
| 2015 Mack GU (Granite) | Truck · Class 8 | 1M2AX04C1FM023725 | 1 | — |
| 2018 Mack GU (Granite) | Truck · Class 8 | 1M2AX04C4JM037806 | 1 | — |
| 2021 Mack Granite | Truck · Class 8 | 1M2GR2TC0MM001360 | 1 | 1 |
| 2022 Mack Granite | Truck · Class 8 | 1M2GR2TC1NM001692 | 1 | 1 |
| 2021 Mack Granite | Truck · Class 8 | 1M2GR2TC4MM001359 | 1 | 1 |
| 2020 Mack Granite | Truck · Class 8 | 1M2GR4GC2LM012526 | 1 | — |
| 2022 Mack Granite | Truck · Class 8 | 1M2GR4GC7NM028031 | 1 | — |
| 2018 Freightliner M2 | Truck · Class 7 | 3ALACXFC8JDJM1045 | 1 | — |
| 2024 Lbt Inc LBT INC TRAILER | Tank · 42 ft | 4J8B0422XRT013002 | 1 | — |
| 2005 Volvo Truck VHD | Chassis / Incomplete · Class 8 | 4V5K99GH75N389177 | 1 | — |
A vehicle appearing here was recorded in an inspection — it is not proof the carrier still operates it today.
Inspection Details
Each roadside inspection with its violations
Inspection Records (36)
| Date | Report # | Location | Level | Viol | OOS | Shipper | Unit Type | Make | VIN | License |
|---|---|---|---|---|---|---|---|---|---|---|
| June 30, 2026 | 5755001300 | ROCKVILLE VA | III | — | — | — | Straight Truck |
MACK |
1M2GR2TC2MM001358 |
VA 13784UA |
| June 29, 2026 | 8031001078 | ROCKVILLE VA | III | — | — | R J BIRNGER CONSTRUCTION | Straight Truck |
MACK |
1M2AX04C18M003218 |
VA 41707UA |
| June 16, 2026 | 7253001655 | NEWPORT NEWS VA | III | 1 | — | — | Truck Tractor Semi-trailer |
MACK LBT INC |
1M1AN07Y6JM028316 4J8B0422XRT013002 |
VA 13780UE VA 3241919TL |
| 392.2-SLLTR | State/Local Laws - Truck restriction | |||||||||
| June 5, 2026 | 7901000192 | IVOR VA | III | — | — | — | Straight Truck |
VOLVO TRUCK |
4V5K99GH07N461016 |
VA 13785UA |
| June 3, 2026 | 8031001066 | ROCKVILLE VA | III | 2 | 1 | — | Straight Truck |
MACK |
1M2GR2TC1NM001692 |
VA 20953UA |
| 391.11B5-LNCDLNVL | OOSLicense - Operate a CMV without a valid operators license, issued by one State or jurisdiction | License-related: High | ||||||||
| 392.2-SLLUCR | State/Local Laws - Failure to pay UCR fee | |||||||||
| May 8, 2026 | 7877000519 | SANDSTON VA | II | 4 | — | — | Straight Truck |
MACK |
1M2AG11C16M041460 |
VA 41706UA |
| 390.21TB1-MC | Operating a CMV without legal name or trade name displayed | |||||||||
| 393.60C | Windshield - Damaged or Discolored | Windshield/ Glass/ Markings | ||||||||
| 393.11A1-LLPL | Lighting - License plate lamp missing | Clearance Identification Lamps/Other | ||||||||
| 392.2-SLLUCR | State/Local Laws - Failure to pay UCR fee | |||||||||
| April 30, 2026 | 5755001192 | SANDSTON VA | III | — | — | — | Straight Truck |
VOLVO TRUCK |
4V5K99GH75N389177 |
VA 46.431TB |
| April 27, 2026 | 7253001530 | NEWPORT NEWS VA | III | — | — | — | Straight Truck |
MACK |
1M2GR4GC2LM012526 |
VA 41702UA |
| March 31, 2026 | 8747000200 | BURKEVILLE VA | III | 1 | — | — | Straight Truck |
MACK |
1M2AG11C77M059785 |
VA 33891TB |
| 392.2-SLLUCR | State/Local Laws - Failure to pay UCR fee | |||||||||
| March 24, 2026 | 7253001432 | BENNS CHURCH VA | III | 2 | — | — | Straight Truck |
INTERNATIONAL |
1HTSDAAN31H314082 |
VA 95850TA |
| 392.2-SLL | State/Local Laws - | |||||||||
| 392.2-SLLEQP | State/Local Laws - Violation of state and local law - Equipment violation. | |||||||||
Shippers Seen at Inspections
Shipper names recorded by roadside inspectors over roughly the last three years. Only inspected loads appear, so this is a sample of who the carrier hauls for, not a complete customer list. Names are as entered at the roadside; blanks and placeholders such as “N/A” or “same as carrier” are left out.
| Shipper | Inspections | Most recent |
|---|---|---|
| R J BIRNGER CONSTRUCTION | 1 | June 29, 2026 |
| PREMIRE POOLS AND SPAS | 1 | January 7, 2026 |
| DACEY CONSTRUCTION | 1 | February 13, 2025 |
| HUNT HOMES | 1 | November 27, 2023 |
CarrierChk Partners
View all partners →Your business here
Introduce your business to carriers.
Explore partnership
Sponsored listings — CarrierChk may be compensated for referrals. Partner with CarrierChk →
Data sourced from FMCSA MCMIS via Socrata. Record last updated: September 28, 2026.
Verify directly on FMCSA SAFER Web.
Verify Any Carrier Free
Search any DOT or MC number for live authority status, insurance on file, and full safety history.
This profile is built from public FMCSA records. If this is your company, you can hide your contact details or remove this page.