| Glossary Word | | Glossary Description | | |
| Online Improvements | | Road improvements using the existing highway limit. |
| |
| OEM | | Original Equipment Manufacturer. |
| |
| Online Improvements | | Road improvements using the existing highway limit. |
| |
| Owner/Operator | | A truck driver who owns and operates his/her tractor/trailer. |
| |
| OEM | | Road improvements using the existing highway limit. |
| |
| Owner/Operator | | A truck driver who owns and operates his/her tractor/trailer. |