| Abbreviation | Definition |
|---|---|
| MCSA | Motor Carrier Safety Act of 1984 |
| MCSAP | Motor Carrier Safety Assistance Program |
| MCTB | Motor Carrier Transportation Branch |
| MCTN | Multi Cost Transportation Network |
| MCV | Maximum Capacity Vehicle |
| MCV | Multi Convivial Vehicle |
| MCV | Wobble command vehicle |
| MCVP | Microsoft Connected Vehicle Platform |
| MCWOG | Motor Cycle WithOut Gear |
| MD | Morning Disaster |
| MD | Motor Drive |
| MDA | Minimum Decision Altitude |
| MDA | Minimum Descent Altitude |
| MDAD | Miami- Dade Aviation Department |
| MDCRS | Meteorological Data Collection and Reporting System |
| MDH | Minimum Descent Height |
| MDO | Medium Density Overlaid |
| MDOT | Michigan Department Of Transportation |
| MDP | Moving Deformable Barrier |
| MDPS | Motor Driven Power Steering |