Illinois (IL) DOT COMPLIANCE
IDOT JURISDICTION
Commercial Combine Harvester with Duals Oversize Permits in Illinois (2026)
Comprehensive carrier guide for transporting Commercial Combine Harvester with Duals across Illinois. Review official IDOT single-trip fees, escort trigger dimensions, curfew hours, and superload bridge thresholds.
⚡ Direct Compliance Summary (Illinois DOT)
In Illinois, single-trip oversize/overweight permits for Commercial Combine Harvester with Duals average $25.00 – $150.00 base under IDOT jurisdiction. A front pilot car is legally mandated on two-lane highways when load width reaches 12'0" (and 14'6" on 4-lane interstates). Loads exceeding 15'0" require a certified lead escort with a calibrated height pole.
Single-Trip Permit Fee
$25.00 – $150.00
Issued by IDOT
2-Lane Escort Trigger
12'0"
4-Lane Trigger: 14'6"
Height Pole Clearance
15'0"
Mandatory Lead Escort
Superload Threshold
145,000 lbs
Police Escort / Bridge Review
⚖️ Federal Bridge Formula B Quick Calculator (Illinois Interstate Corridors)
Estimate your allowable gross vehicle weight under Federal Bridge Formula B: W = 500 [LN/(N-1) + 12N + 36].
🚦 Illinois Travel Curfews & Operational Restrictions
Metropolitan Rush-Hour Curfews: Cook County / Chicago 6:00-9:00 AM, 4:00-6:00 PM
Weekend Travel: Saturday till noon; No Sunday
Safety Equipment: Slow Moving Vehicle (SMV) emblem, high-intensity amber flashers, side outrigger marker flags.
🗺️ Continuous Interstate Corridor: Bordering States for Commercial Combine Harvester with Duals
Hauling across state lines? Check escort triggers and permit rates in states directly bordering Illinois: