R L Mcnair And Son Llc is an active interstate carrier based in Emmitsburg, MD.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 19 | 0 | 0 |
| Tractors | 2 | 0 | 0 |
| Total Power Units | 21 | ||
Distinct vehicles · 24 mo
vs 21 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 95% | 92% | Worse than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 64% | 88% | Around peer average |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 81% | 86% | 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 | 0 | — | 6.67% |
| Vehicle | 0 | 7 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Jul 1, 2025 | 0 | 0 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 32 | 5 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 9, 2026 | MD | STRAIGHT TRUCK | 2 | 0 |
| Feb 25, 2026 | MD | STRAIGHT TRUCK | 1 | 0 |
| Feb 11, 2026 | MD | STRAIGHT TRUCK | 5 | 1 |
| Jan 15, 2026 | MD | STRAIGHT TRUCK | 1 |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 7 | 3.28 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 14 | 5.72 | — |
| Driver Fitness | 1 | 0.28 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 2 states. Top state MD accounts for 83% of activity. Activity outside home state (MD): 17%.
| 7 |
| Unsafe Driving | 8 | 6 | 0 |
| Driver Fitness | 1 | 1 | 0 |
| Jan 2, 2026 | MD | STRAIGHT TRUCK | 4 | 1 |
| Dec 19, 2025 | PA | STRAIGHT TRUCK | 2 | 0 |
| Nov 18, 2025 | MD | STRAIGHT TRUCK | 2 | 0 |
| Nov 13, 2025 | MD | STRAIGHT TRUCK | 1 | 0 |
| Nov 3, 2025 | MD | STRAIGHT TRUCK | 1 | 0 |
| Sep 23, 2025 | PA | STRAIGHT TRUCK | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 9, 2026 | 39347E | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | Vehicle Maintenance | — |
| Mar 9, 2026 | 39353BB | Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear | Vehicle Maintenance | — |
| Feb 25, 2026 | 39395A1 | Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated. | Vehicle Maintenance | — |
| Feb 11, 2026 | 393209DSTBSP | Steering - Ball and socket joint has movement greater than 1/8 inch measured with hand pressure | Vehicle Maintenance | Yes |
| Feb 11, 2026 | 39345DB | Air Brake - Audible air leak at a proper connection | Vehicle Maintenance | — |
| Feb 11, 2026 | 39347E | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | Vehicle Maintenance | — |
| Feb 11, 2026 | 39353BB | Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear | Vehicle Maintenance | — |
| Feb 11, 2026 | 3965BL | Lubrication - Oil or grease leak | Vehicle Maintenance | — |
| Jan 15, 2026 | 39345B2BHTD | Air Brake - Hose/tubing damage into the outer reinforcement ply. | Vehicle Maintenance | Yes |
| Jan 2, 2026 | 39347E | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | Vehicle Maintenance | — |