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Illinois Commercial Trucking & Chicago Axle Weight Atlas
Interactive compliance guide for IDOT commercial weight limits, Chicago parkway prohibitions, Cook County diesel taxes, and I-294 toll pass-through calculations.
IDOT Designated Highways
Class I and II state routes permit 80,000 lbs GVW with 20,000 lbs single axle and 34,000 lbs tandem axle. Bridge Formula B strictly enforced on non-designated local roads (73,280 lbs cap).
Chicago Parkway Restrictions
Class 8 tractors are strictly banned on DuSable Lake Shore Drive, Michigan Avenue, and the Chicago Boulevard system. Strict GPS boundary enforcement protects against municipal impoundments.
Cook County Diesel Surcharge
Cook County assesses an additional $0.06/gal diesel tax on top of Illinois state rates. Exspeedite automatically tracks municipal fuel tax zones for precision IFTA quarterly filing.
Illinois Toll & Permit Pass-Through Estimator
Modeled Annual Toll Recovery Opportunity:
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IDOT Axle & Dimension Permitting Matrix
| Classification | Max Weight / Dimensions | IDOT Permit Type | Exspeedite Automated Control |
|---|---|---|---|
| Standard 5-Axle Tractor-Trailer | 80,000 lbs GVW | 53' Trailer | Legal Gross (No Permit) | Pre-dispatch weight ticket validation |
| Single Axle Limit | 20,000 lbs | Legal Standard | Scale ticket scan and distribution alert |
| Tandem Axle Limit | 34,000 lbs | Legal Standard | Slider pin telemetry check |
| Form BT 753 Routine Overweight | Up to 120,000 lbs GVW | Single Trip Routine (IDOT) | Automated route clearance & curfew lock |
| Chicago Oversize Envelope | Width > 8'6" | Height > 13'6" | CDOT City Permit + Escort | Restricted bridge and viaduct routing interlock |
Schedule an Illinois Freight Architecture Clinic with Scott Elliott
Discuss Chicago toll pass-through automation, IDOT permit tracking, and touchless rating with transportation architect Scott Elliott.