Hazardous Material (HAZMAT) — Any article or substance designated by the U.S. Department of Transportation (DOT) as being capable of posing an unreasonable risk to health, safety, and property during transportation.

 

Highway Contract Route (HCR) —A route of travel served by a postal contractor to carry mail over highways between designated points. Some HCRs include mail delivery to addresses along the line of travel. Formerly called star route