| Af | Front area |
| Alt | Altitude |
| ANN | Artificial neural network |
| ax | Longitudinal acceleration |
| CX | Drag coefficient |
| Density | |
| Fa | Aerodynamic resistance |
| Fg | Gravitational resistance |
| Fr | Rolling resistance force |
| Fslope | Force slope |
| GPS | Global position system |
| Lat | Latitude |
| Lon | Longitude |
| m.a.s.l | Meters above sea level |
| m | Mass |
| OBD | On-board diagnostics |
| PID | Parameter of identification |
| RDE | Real driving emissions |
| ROC | Receiver operating characteristic |
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