| AADT | Annual Average Daily Traffic |
| DoT | Department of Transportation |
| FHWA | Federal Highway Administration |
| FMCSA | Federal Motor Carrier Safety Administration |
| NDS | Naturalistic Driving Study |
| NHTSA | National Highway Traffic Safety Administration |
| NOAA | National Oceanic & Atmospheric Administration |
| VT | Virginia Tech |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.