HaulerCheck · https://haulercheck.com/carrier/3593431-diamond-transport-corporation/ · Checked 2026-10-20 09:09 UTC · Census and inspections Oct 19, 2026 · Authority and insurance: FMCSA Motus · Oct 19, 2026
DIAMOND TRANSPORT CORPORATION
Review before booking · 1 signal
How risk signals workFacts from the FMCSA record that call for a closer look. They are not a finding of wrongdoing.
- Liability insurance lapsed in the last 12 monthsPROGRESSIVE CASUALTY INSURANCE COMPANY policy cancelled May 16, 2026; the next filing took effect Jun 6, 2026, 21 days later. During a lapse the company had no liability insurance on file with FMCSA; ask for a current certificate of insurance.
No cargo cover filed with FMCSA
Green means the FMCSA record shows it. It does not confirm who you are talking to, or that a policy covers your specific load.
What to verify next
- Confirm authority and insurance on the official Motus record ↗. Safety record: SAFER ↗.
- Call back on the number on file, (240) 661-3688, not a number from an email or load board.
- Check that the MC number you were given is MC1217971.
- Ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Insurance on file
Liability (BI&PD) pays for injury and damage to other people and property; it does not cover the freight. Cargo insurance covers the freight. FMCSA only requires cargo filings from household goods carriers and freight forwarders, so most carriers file none: ask for a cargo certificate that fits your load. No cargo cover filed with FMCSA.
| Type | Docket | Layer | Insurer | Coverage | Effective | Status |
|---|---|---|---|---|---|---|
| Liability (BI&PD) | MC1217971 | Primary | Progressive Casualty Insurance Company Policy CA870070227 · BMC-91X | $750,000 | Jun 6, 2026 | Active |
Insurance that ended since 2024 · 7 policies
| Ended | Type | Insurer | Effective | How it ended |
|---|---|---|---|---|
| May 16, 2026 | Liability (BI&PD) MC1217971 | PROGRESSIVE CASUALTY INSURANCE COMPANY Policy CA870070227 | May 1, 2026 | Cancelled at term end |
| May 1, 2026 | Liability (BI&PD) MC1217971 | PROGRESSIVE CASUALTY INSURANCE COMPANY Policy CA870070227 | Mar 6, 2026 | Cancelled at term end |
| Apr 28, 2026 | Liability (BI&PD) MC1217971 | PROGRESSIVE CASUALTY INSURANCE COMPANY Policy CA870070227 | May 1, 2026 | Replaced |
| Apr 7, 2026 | Liability (BI&PD) MC1217971 | AGENCY INSURANCE COMPANY OF MARYLAND, INC Policy CA 0038317 | Jul 31, 2024 | Cancelled at term end |
| Mar 6, 2026 | Liability (BI&PD) MC1217971 | AGENCY INSURANCE COMPANY OF MARYLAND, INC Policy CA 0038317 | Jul 31, 2024 | Replaced |
| Aug 15, 2024 | Liability (BI&PD) MC1217971 | AGENCY INSURANCE COMPANY OF MARYLAND, INC Policy CA 0038317 | Apr 20, 2023 | Cancelled at term end |
| Jul 31, 2024 | Liability (BI&PD) MC1217971 | AGENCY INSURANCE COMPANY OF MARYLAND, INC Policy CA 0038317 | Apr 20, 2023 | Replaced |
"Replaced" means a new filing took over the day the old one ended. "Cancelled" means the insurer or the company ended the policy; if no replacement was filed in time, the company was uninsured with FMCSA in between.
Source: FMCSA Motus · Oct 19, 2026. Identical filings repeated in the FMCSA data are shown once; a filing listed under two dockets is one policy, not extra coverage. Coverage is the maximum amount filed with FMCSA, not the full policy.
Confirm current filings: Motus record ↗ and ask the insurer for a certificate naming you as holder.
Roadside inspections Oct 19, 2024 – Oct 19, 2026
1 of 2 · Maryland avg 20.8%
3 of 7 · Maryland avg 9.4%
By quarter inspections and vehicle out-of-service rate
Bar height: inspections in the quarter. Percentage: vehicles put out of service, of vehicle inspections. The first and last quarters are partial.
Where it was inspected 4 states and provinces, 24 months
- NJ 3 42.9%
- CT 2 28.6%
- MA 1 14.3%
- PA 1 14.3%
Vehicles seen at inspections different VINs, 24 months
Power units: 3
2 straight trucks · 1 tractors
Freightliner 4
5 power units declared on the MCS-150. Inspections see only part of a fleet, so fewer here is normal; many more can mean the registration is out of date.
Shippers named on inspection reports 24 months
Yakult 1
As written by roadside inspectors, who note the shipper on the bill of lading. Only names that appear on at least three different carriers' reports are shown, so private individuals are never listed. A shipper on a report is not a reference.
7 most recent inspections
| Date | State | Level | Violations | Out of service |
|---|---|---|---|---|
| Mar 4, 2026 | CT | 3 | 2 | Yes |
| Jan 21, 2026 | PA | 3 | 2 | Yes |
| Dec 23, 2025 | CT | 2 | 4 | No |
| May 27, 2025 | NJ | 3 | 0 | No |
| Apr 23, 2025 | MA | 1 | 13 | Yes |
| Feb 7, 2025 | NJ | 3 | 2 | No |
| Dec 9, 2024 | NJ | 3 | 1 | No |
How these rates are calculated
Period: Oct 19, 2024 – Oct 19, 2026. Vehicle rate = vehicle inspections with a vehicle out-of-service order ÷ vehicle inspections (levels 1, 2, 5 and 6). Driver rate uses levels 1, 2, 3 and 6. The Maryland average covers 42,343 vehicle and 51,693 driver inspections of all Maryland-based carriers in this period. It mixes every type of operation, so compare with care; rates based on a handful of inspections say little. FMCSA's own SMS measures are weighted differently: SMS profile ↗ · SAFER snapshot ↗
Violations in FMCSA's SMS last 24 months
20 violations counted in FMCSA's Safety Measurement System (SMS), 6 of them serious enough to put the driver or vehicle out of service.
Why is this different from the 24 violations above?
The inspections section's number counts every violation written on the inspection reports in our Oct 19, 2024 – Oct 19, 2026 window. The SMS count comes from FMCSA's own monthly SMS snapshot, which uses its own 24-month window and only the violations it scores. Both are FMCSA figures; they measure different things.
| Category (FMCSA BASIC) | Violations | Out of service | Share | Maryland share |
|---|---|---|---|---|
| Vehicle Maintenance | 11 | 2 | 55.0% | 71.4% |
| Driver Fitness | 3 | 2 | 15.0% | 6.6% |
| Hours-of-Service Compliance | 3 | 2 | 15.0% | 10.3% |
| Unsafe Driving | 3 | 0 | 15.0% | 10.9% |
10 most frequent violations
| Violation | Times | Out of service |
|---|---|---|
| License (CDL) - Operate a CMV and does not possess a valid CDL License-related: High · Driver Fitness · code 38323A2LCDLN | 2 | 2 |
| HOS (Property) - Driver driving beyond the 14 hour after coming on duty following 10 consecutive hours off duty at the time of inspection. Time Hours · Hours-of-Service Compliance · code 3953A2HOSPDIT | 1 | 1 |
| HOS (Property) - Failing to have a record of duty status using the method prescribed Incomplete/Wrong Log · Hours-of-Service Compliance · code 3958A1HOSP | 1 | 1 |
| Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination Brake Out Of Service · Vehicle Maintenance · code 3963A1BOS | 1 | 1 |
| Cargo - Immobilized such so that it cannot shift or tip to the extent that the vehicle's stability or maneuverability is adversely affected Improper Load Securement · Vehicle Maintenance · code 393102C1C | 1 | 1 |
| Medical (Certificate) - Operating a commercial motor vehicle without showing proof of a valid medical certification upon request but presents proof prior to com Medical Certificate · Driver Fitness · code 39141AMCPC | 1 | 0 |
| HOS (Form) - Paper Log/Logging Programs Form and Manner Other Log/Form & Manner · Hours-of-Service Compliance · code 3958A | 1 | 0 |
| State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g. safety official signal sign light lane marking other Dangerous Driving · Unsafe Driving · code 3922SLLTCD | 1 | 0 |
| State/Local Laws - Failure to maintain lane Dangerous Driving · Unsafe Driving · code 3922SLML | 1 | 0 |
| State/Local Laws - Speeding 6-10 miles per hour over the speed limit Speeding 2 · Unsafe Driving · code 3922SLLS2 | 1 | 0 |
Source: FMCSA SMS violation file, inspections in the last 24 months, published Oct 19, 2026. "Share" is this company's mix of violations; the Maryland column is the mix across all Maryland-based carriers, so you can see which kinds of problems stand out. A high count partly reflects fleet size and how often trucks are inspected.
Crashes Oct 19, 2024 – Oct 19, 2026
Crash details
| Date | Location | Fatalities | Injuries |
|---|---|---|---|
| Sep 9, 2026 | Coolbaugh Township, PA | 1 | 0 |
Reportable crashes do not imply the carrier was at fault.
Company details FMCSA census · Oct 19, 2026
| USDOT number | 3593431 |
|---|---|
| MC / docket | MC1217971 |
| Legal name | DIAMOND TRANSPORT CORPORATION |
| Operation | Interstate |
| Business type | — |
| Power units | 5 |
| Drivers | 5 |
| Annual mileage | 128,700 (2025) |
| Hazmat | No |
| Safety rating | Not rated (no compliance review on record) |
| USDOT number added | Mar 19, 2021 · 5 years ago |
| Last MCS-150 update | May 4, 2026 |
| Email domain on file | @outlook.com (free email service) |
Equipment as declared on the MCS-150
| Owned | Term-leased | |
|---|---|---|
| Straight trucks | 5 | 0 |
Term-leased equipment usually belongs to owner-operators driving under this company's authority.
Cargo carried
General Freight
Change history
No changes to name, contact details, authority or insurance since we started tracking on Oct 18, 2026. We compare every company's FMCSA record each day.
to see it on your watchlist when something changes.
Questions about DIAMOND TRANSPORT CORPORATION
What does DIAMOND TRANSPORT CORPORATION's operating authority allow?
MC1217971: Motor carrier (may haul regulated property for hire).
Which information about DIAMOND TRANSPORT CORPORATION is old or missing?
There are too few vehicle inspections in the last 24 months to judge the out-of-service rate. FMCSA has not issued a safety rating, which means no compliance review is on record, not that the carrier is unsafe.
What should I verify before booking DIAMOND TRANSPORT CORPORATION?
Confirm the authority and insurance on the Motus record for USDOT 3593431. Call the company back on the phone number on file, (240) 661-3688, not a number from an email or load board message. Check that the MC number the dispatcher gave you matches MC1217971, and ask the insurer for a certificate of insurance naming you as holder, with cargo coverage that fits your load.
Other trucking companies in Middle River, MD →
Company details from the FMCSA Company Census File (Oct 19, 2026). Inspections and crashes from FMCSA MCMIS files. About our data · Report an error on this page (how corrections work).
Page generated 2026-10-20 09:09 UTC.