Idaho oversize load rules
Legal limits, pilot car requirements, travel restrictions, superload thresholds and permit fees for oversize and overweight loads in Idaho.
Legal limits without a permit
| Width | 8′6″ (Idaho Code 49-1010) |
|---|---|
| Height | 14′ |
| Length | 45′ single vehicle · 48′ trailer or semitrailer · 75′ overall · 4′ front / 10′ rear overhang |
| Weight | 80,000 lb on Interstate; up to 105,500 lb on other routes under Idaho Code 49-1001 (129,000 lb on designated routes by permit) |
What Pro adds for Idaho
- 4 escort rules with counts by width, height, length and road type
- 4 travel restrictions: curfews, night, weekends, holidays
- Superload thresholds and conditions
- 4 published fee lines and permit lead time
- Lane routing with miles per state and a cost breakdown
Escort (pilot car) requirements
- 4 width, height and length thresholds with the escort count for each
- Overhang and route-type conditions
Travel restrictions
- 4 restrictions: curfews, night travel, weekends and holidays
- Which ones apply to a given load size
Superloads
- Exact thresholds and what the state requires past them
- Lead times, route surveys and police escort conditions
Permit fees
- 4 published fee lines with links to the fee schedule
- Validity periods and add-on charges
Common questions
Does Idaho have a superload threshold?
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Can oversize loads travel 24 hours in Idaho?
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How much is an Idaho oversize permit?
Answer available to members. Start free or sign in.
Sources
- ITD Rules Governing Overlegal Permits (IDAPA 39.03) consolidated text
- Idaho Code 49-1010, size of vehicles and loads
- Idaho Code Title 49 Chapter 10 (49-1001 weight limits)
- ITD permits (CVS contact, online permits)
Planning reference. Permits carry their own conditions, and city and county roads have separate rules. Confirm with the Idaho Transportation Department, Commercial Vehicle Services / Overlegal Permits (Boise) before moving a load. Found an error? Report it.
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