Diamondback Signal Llc is an active interstate carrier based in Sykesville, MD.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 3 | 0 | 0 |
| Total Power Units | 3 | ||
Distinct vehicles · 24 mo
vs 3 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 99% | 99% | Worse than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 87% | 90% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 72% | 77% | Around peer average |
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 | 1 | — | 6.67% |
| Vehicle | 0 | 1 | — | 22.26% |
| Hazmat | 0 | 0 | — | 4.44% |
Where they run
Inspected in 1 state. Top state accounts for of activity.
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Unsafe Driving | 3 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 11, 2026 | MD | STRAIGHT TRUCK | 3 | 1 |
| Mar 4, 2026 | MD | STRAIGHT TRUCK | 1 | 1 |
| Feb 2, 2026 | MD | STRAIGHT TRUCK | 1 | 0 |
| Feb 2, 2026 | MD | STRAIGHT TRUCK | 0 | 0 |
Carriers that share an officer, phone, or email with this DOT.
Shared officer · 5
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John Brunner & Company
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John Brunner · also at 5 others
Northeastern Wisconsin Fitness Equipment Inc
Manitowoc, WI
John Brunner · also at 5 others
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 3 | 15.33 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 1 | 1.60 | — |
| Driver Fitness | 1 | 0.56 | — |
| Controlled Substances | 0 | 0.00 | — |
| 2 |
| 0 |
| Vehicle Maintenance | 2 | 0 | 1 |
| Driver Fitness | 1 | 0 | 1 |
| Feb 19, 2025 | MD | STRAIGHT TRUCK | 1 | 0 |
| May 20, 2024 | MD | STRAIGHT TRUCK | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 11, 2026 | 3922SLLS3 | State/Local Laws - Speeding 11-14 miles per hour over the speed limit | Unsafe Driving | — |
| Mar 11, 2026 | 39341BNPB | Brake - Inoperative or missing parking brake on power unit | Vehicle Maintenance | Yes |
| Mar 11, 2026 | 39395F | Emergency Equipment - Stopped vehicle warning devices missing or improper | Vehicle Maintenance | — |
| Mar 4, 2026 | 39141APC | Medical (Certificate) - Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency | Driver Fitness | Yes |
| Feb 2, 2026 | 3922SLLTCD | State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign light lane marking other | Unsafe Driving | — |
| Feb 19, 2025 | 3922SLLS4 | State/Local Laws - Speeding 15 or more miles per hour over the speed limit | Unsafe Driving | — |