Illinois oversize load rules
Legal limits, pilot car requirements, travel restrictions, superload thresholds and permit fees for oversize and overweight loads in Illinois.
Legal limits without a permit
| Width | 8′6″ |
|---|---|
| Height | 13′6″ |
| Length | 53′ semitrailer · 65′ overall on non-designated highways · 42′ single vehicle |
| Weight | 80,000 lb gross on 5 or more axles |
What Pro adds for Illinois
- 8 escort rules with counts by width, height, length and road type
- 4 travel restrictions: curfews, night, weekends, holidays
- Superload thresholds and conditions
- 3 published fee lines and permit lead time
- Lane routing with miles per state and a cost breakdown
Escort (pilot car) requirements
- 8 width, height and length thresholds with the escort count for each
- Police escort triggers
- 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
- 3 published fee lines with links to the fee schedule
- Validity periods and add-on charges
Common questions
When does a load need a pilot car in Illinois?
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Can oversize loads travel on Sundays in Illinois?
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How tall can a load be in Illinois?
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Sources
- 92 Ill. Adm. Code 554.407, when escort vehicles are required
- 92 Ill. Adm. Code 554.201, single trip movement times
- 92 Ill. Adm. Code 554.505 and 554.508, width over 14′6″ and overheight
- 625 ILCS 5, Chapter 15 (legal size and weight)
- IDOT over-dimension fee categories, Table 1 (PDF)
- IDOT OSOW resources and fee estimator
Planning reference. Permits carry their own conditions, and city and county roads have separate rules. Confirm with the Illinois DOT Permit Office before moving a load. Found an error? Report it.
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