Trucking carriers based in Maryland
How Maryland carriers fare at the roadside, measured against every other state, from federal inspection and crash records.
Maryland ranks 14 of 45 rated states by out-of-service rate, worst first — 18% higher than the national figure.
Largest carriers
| Carrier | Power units | Drivers | Inspections | Out of service |
|---|---|---|---|---|
| THE POTOMAC EDISON COMPANY | 225 | 264 | 50 | 8.0% |
| TRI-GAS & OIL COMPANY INC | 162 | 205 | 103 | 5.8% |
| CANADA DRY POTOMAC CORP | 154 | 138 | 99 | 13.1% |
| BALTIMORE TANK LINES LLC | 130 | 130 | 568 | 19.2% |
| CLOVERLAND DAIRY L P | 104 | 120 | 206 | 8.3% |
| KELLER TRANSPORTATION INC | 99 | 64 | 252 | 0.0% |
| LONERGANS CHARTER SERVICE INC | 99 | 106 | 371 | 0.5% |
| THE WINNER DISTRIBUTING CO | 98 | 62 | — | — |
| THOMAS BENNETT & HUNTER INC | 95 | 99 | 27 | 0.0% |
| CRANE SERVICE COMPANY INC | 92 | 90 | 34 | 29.4% |
| DAIRY MAID DAIRY LLC | 87 | 87 | 167 | 4.2% |
| A P WOODSON | 86 | 58 | 96 | 7.3% |
| MCCLUNG LOGAN EQUIPMENT COMPANY INC | 85 | 62 | 32 | 6.3% |
| THOS SOMERVILLE CO | 77 | 77 | 119 | 9.2% |
| WHITCRAFT SERVICES INC | 58 | 73 | 23 | 0.0% |
| CATO INC | 55 | 30 | 158 | 8.2% |
| COMPTON BUS SERVICES INC | 53 | 62 | 15 | 20.0% |
| POTTS & CALLAHAN INC | 52 | 14 | 16 | 31.3% |
| KOSKI TRUCKING INC | 45 | 31 | 87 | 5.7% |
| MILLER & LONG CO INC | 45 | 25 | 7 | 28.6% |
Compare with another state
The twelve highest out-of-service rates on file.
- Louisiana 20.0%
- Indiana 16.4%
- North Dakota 15.3%
- Washington 14.5%
- Oregon 14.4%
- Montana 14.3%
- Pennsylvania 14.2%
- Colorado 14.0%
- Texas 13.9%
- Mississippi 13.9%
- Idaho 12.3%
- Kentucky 12.3%
Reading these numbers
These are rates, not totals. A count of carriers here describes the records we hold, not everything Maryland has on the road. A rate does not depend on how much of the state we hold, which is why it is the figure on this page. It is weighted by inspections, so a few large carriers move it more than many small ones.
An out-of-service order means an inspector found something serious enough to stop the vehicle or driver until it was fixed. The rate counts inspections that ended in such an order, over inspections performed — not violations, several of which can come from one inspection. A crash on a carrier’s record is not a finding of fault.