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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.