| ACRONYM |
DEFINITION |
| AADT |
average annual daily traffic |
| AADTT |
average annual daily truck traffic |
| BI |
buffer index |
| BTS |
Bureau of Transportation Statistics |
| DOT |
department of transportation |
| DPM |
delay per mile |
| FAF |
Freight Analysis Framework |
| FHWA |
Federal Highway Administration |
| FMT |
Freight Mobility Trends |
| HPMS |
Highway Performance Monitoring System |
| MAP-21 |
Moving Ahead for Progress in the 21st Century Act |
| MPO |
metropolitan planning organization |
| NHFN |
National Highway Freight Network |
| NHS |
National Highway System |
| NPMRDS |
National Performance Management Research Data Set |
| PHFS |
Primary Highway Freight System |
| PTI |
planning time index |
| STRAHNET |
Strategic Highway Network |
| TEUs |
twenty-foot equivalent units |
| TMC |
Traffic Message Channel |
| TRI |
truck reliability index |
| TSI |
transportation services index |
| TTI |
travel time index |
| TTTR |
truck travel time reliability |
| TVMT |
truck vehicle miles of travel |
| UP |
Union Pacific |
| USDOT |
U.S. Department of Transportation |
