Trucking Regulations in Illinois
Complete guide to weight limits, speed limits, permits, chain laws, and special rules for commercial truck drivers operating in Illinois.
Max Gross Weight
80,000 lbs (overweight permits available on state routes)
Truck Speed Limit
65 mph on some interstates
Diesel Tax
$0.467 per gallon diesel + federal (increased 2024)
Weight & Size Limits in Illinois
| Measurement | Limit |
|---|---|
| Max Gross Vehicle Weight | 80,000 lbs (overweight permits available on state routes) |
| Max Axle Weight | 20,000 lbs single axle, 34,000 lbs tandem |
| Max Trailer Length | 53 ft trailer, 65 ft overall |
| Max Width | 102 inches |
| Max Height | 13'6" |
Speed Limits for Trucks in Illinois
Rural Interstate
70 mph
Urban Interstate
55 mph
Truck-Specific
65 mph on some interstates
Fuel Tax & Tolls in Illinois
Diesel Fuel Tax
$0.467 per gallon diesel + federal (increased 2024)
Toll Roads & Bridges
Illinois Tollway system: I-88, I-90 (Jane Addams), I-355, I-294 (Tri-State), Elgin-O'Hare. I-PASS transponder required. Truck toll rates significantly higher than cars.
Chain Laws & Weather Requirements
No chain law, but IDOT can restrict travel during severe winter storms.
Oversize & Overweight Permits
IDOT Permits Bureau. Complex routing needed in Chicago metro area. Escort vehicles required for oversize loads on many routes.
Port of Entry & Weigh Stations
No traditional ports of entry but IDOT operates weigh stations on I-55, I-57, I-74, I-80, I-94. Mobile enforcement units active throughout the state.
Special Rules for Illinois
Hazmat Route Restrictions
Hazmat restricted through many Chicago neighborhoods and suburbs. Designated routes avoid downtown Loop area. Lake Shore Drive prohibits all commercial vehicles. Hazmat restrictions on I-290 and I-94 through Chicago.
Rest Area & Parking Rules
Rest areas and oases (toll road plazas) allow varying parking times. Severe truck parking shortage in Chicago metro. No statewide anti-idling law but Chicago has 10-minute idle limit.
DOT Inspection Frequency
High. Illinois State Police District 15 (commercial vehicle enforcement) is very active. Chicago area sees heavy enforcement on I-94, I-90, and I-80.
Looking for Trucking Jobs in Illinois?
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Frequently Asked Questions About Illinois Trucking Regulations
How much do tolls cost for trucks in Illinois?
Illinois Tollway charges significantly more for commercial vehicles. A 5-axle truck can pay $15-50+ per trip depending on the route and distance. The I-294 Tri-State Tollway and I-90 Jane Addams are the most expensive corridors. I-PASS offers discounted rates vs. cash tolling.
What is the diesel fuel tax in Illinois?
Illinois has one of the highest diesel taxes in the nation at $0.467 per gallon at the state level (increased in 2024), plus the federal excise tax. This makes refueling in Illinois significantly more expensive than neighboring states like Indiana and Iowa.
What are the low bridge hazards in Chicago?
Chicago has numerous railroad viaducts and overpasses with clearances as low as 10'6". Bridge strikes are a frequent and costly problem. Drivers must use commercial GPS routing and pay close attention to posted clearance signs, especially on surface streets in the city.
What are the weight enforcement practices in Illinois?
Illinois strictly enforces weight limits on state highways using the bridge formula. IDOT operates weigh stations on major interstates and uses mobile enforcement units throughout the state. Overweight fines are steep: up to $15 per pound over the limit on state highways.
Is truck parking a problem in Illinois?
Yes, the Chicago metro area has a severe truck parking shortage. Finding overnight parking near O'Hare area distribution centers or along the I-80 corridor can be very difficult. Drivers should plan parking in advance, especially for evening arrivals. Tollway oases offer limited truck parking.