
| 6R | Rural minor collectors |
| 7R | Rural local roads |
| 7U | Urban local roads |
| AADPC | Annual average daily probe count |
| AADT | Annual average daily traffic |
| AADWPC | Annual average day-of-week probe count |
| ACV | Average coefficient of variation |
| ADPC | Average daily probe count |
| ADT | Average daily traffic |
| AP | Average precision |
| APE | Absolute percent error |
| ASTM | American Society for Testing and Materials |
| CCS | Continuous count station |
| CV | Coefficient of variation |
| DF | Daily factor |
| DOT | Department of transportation |
| DT | Decision tree |
| DWF | Day-of-week factor |
| ELD | Electronic logging device |
| FC | Functional class |
| FC RU | Functional class and rural/urban code |
| _ GPS | Global positioning system |
| HPMS | Highway Performance Monitoring System |
| LBS | Location-based service |
| MADPC | Monthly average daily probe count |
| MADT | Monthly average daily traffic |
| MADWPC | Monthly average day-of-week probe count |
| MADWT | Monthly average day-of-week traffic |
| MAPE | Mean absolute percent error |
| MDWF | Monthly day-of-week factor |
| MF | Monthly factor |
| NCDOT | North Carolina Department of Transportation |
| OEM | Original equipment manufacturer |
| PE | Percent error |
| PTR | Portable traffic recorder |
| RU | Rural/urban |
| SDC | Short-duration count |
| TMG | Traffic Monitoring Guide |
| VG | Volume group |
| vpd | Vehicles per day |
| WACV | Weighted average coefficient of variation |
| WAP | Weighted average precision |
| WCSS | Within-cluster sum of squares |
| WIM | Weigh-in-motion |
| WisDOT | Wisconsin Department of Transportation |
| WSDOT | Washington State Department of Transportation |
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