Vehicle model-level breakdown for trucks and buses
| Vehicle types | Description | Examples | |
|---|---|---|---|
| Medium-duty
(Classes 4–6) |
Gross vehicle weight ratings (GVWRs): 14,001–26,000 lbs | Box, delivery, utility, and construction trucks |  |
| Heavy-duty
(Classes 7–8) |
GVWR: >26,001 lbs | The largest trucks, day cabs and sleeper tractor trailers, garbage and cement trucks, fire engines |  |
| Coach bus
(Classes 7–8/ Type A) |
Passenger vehicle with GVWR: >26,001 lbs |  |
|
| Transit bus (Class 7) | Conventional or articulating local public transportation |  |
|
| School bus (Class 6/Types A–D) |  |
