IL · ITAP (Illinois Transportation Automated Permits) · In-house
Illinois Oversize / Overweight Permits
Chicago metro commuter curfews are the operational pain point. IDOT runs ITAP in-house and has publicly stayed off third-party vendors — fee and process changes come directly from the state.
At a glance
Fast facts. The official portal is the final word.
Base fee
Refer to ITAP fee schedule at filing; varies by axle configuration and route.
Turnaround
Hours to one business day for routine; longer for superloads.
Auto-issue
Routine in-spec permits typically auto-issue within hours.
Pilot car / escort pattern
General thresholds. Route-specific rules can be stricter — verify at filing.
Pilot cars generally required for width above ~12 ft, height above ~14′6″, or length above ~100 ft on most routes.
Holiday & curfew pattern
When you can't move. Always confirm the exact calendar with the state at filing.
Federal holidays restricted. Chicago metro commuter curfews on weekday peak hours block superload movement on I-90, I-94, I-290, I-355. Weekend restrictions vary by route.
Common gotchas
The things drivers consistently get tripped up on.
Chicago peak-hour curfews (typically 6–10 AM and 3–7 PM on major routes) catch out-of-state drivers planning continuous travel.
Official sources
File and verify here.
Other states in the directory
Most superloads cross state lines. Check each transit state separately.