States highlighted in red have no routes listed in the registry.

NOTE:  THE DESCRIPTION OF THE ROUTE PROVIDED IN THE LEGEND OF EACH STATE MAP MUST BE CONSIDERED IN CONJUNCTION WITH THE ROUTE OR AREA DEPICTED ON THE MAP.

ROUTE RESTRICTION CODES:
   0 - ALL Hazardous Materials
   1 - Class 1—Explosives
   2 - Class 2—Gas
   3 - Class 3—Flammable Liquid
   4 - Class 4—Flammable Solid
   5 - Class 5—Organic
   6 - Class 6—Poison
   7 - Class 7—Radioactive
   8 - Class 8—Corrosives
   9 - Class 9—Dangerous (Other)
   i  - Poisonous Inhalation Hazard (PIH)

ROUTE DESIGNATION CODES:
   A - ALL NRHM Hazardous Materials
   B - Class 1—Explosives
   I   - Poisonous Inhalation Hazard (PIH)
   P - *Preferred* Class 7 (HRCQ/RAM)