(for the most part)
Truck speed limit increases on major highways -- chicagotribune.com
CHICAGO - Gov. Pat Quinn has signed a new law increasing the speed limit for large trucks on major highways in Illinois outside the six-county Chicago area to 65 mph.
Under the bill signed into law Friday, the increase applies to trucks carrying a gross weight of 8,001 pounds or more on interstates and other highways with at least four lanes and dividing medians. Within Cook, DuPage, Kane, Lake, McHenry and Will counties, however, the speed limit for such trucks will be 55 mph.
The speed limit for trucks carrying a gross weight of 8,000 pounds or less will also be 65 mph, which also applies on the Illinois State Tollway system outside urban areas.
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The legislation is HB3956.