Idaho

Rocky Mountain (PADD 4)

$6.407

Diesel /gal · 26th cheapest

32¢

State fuel tax · 34th lowest

16.5%

OOS rate · 19th lowest

29,682

Inspections (24 mo)

Diesel price trend

Rocky Mountain (PADD 4) · 3 years, EIA weekly

Weekly on-highway diesel · 2023-10-09 → 2026-09-28

Fuel

Retail diesel6.407/gal

National avg: 6.407/gal · at or below average

Tax at the pump56.4¢/gal

■ State 32¢ ■ Federal 24.4¢ · per gallon

Roadside safety

FMCSA inspections in Idaho, last 24 months

Out-of-service rate16.5%

National avg: 17.6% · at or below average

Violations per inspection2.2

Out-of-service by inspection type

Driver9,069 viol · 38% OOS

Vehicle14,118 viol · 52% OOS

HazMat173 viol · 29% OOS

29,682

Inspections

44th most

65,432

Violations

10,788

OOS violations

36.3

Viol / 100 insp

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Diesel: U.S. Energy Information Administration (weekly, by region — states inherit their PADD region price). Fuel tax: FHWA Highway Statistics MF-121T. Inspections & out-of-service: FMCSA (last 24 months). Estimates for guidance, not official figures. Not affiliated with FMCSA.