Kentucky is a high-volume freight state anchored by the Louisville logistics hub, home to the UPS Worldport air hub at Louisville Muhammad Ali International Airport — the world's second-largest air freight hub — and a dense concentration of warehousing and distribution centers. I-65, I-64, I-71, I-75, and I-24 form a statewide Interstate network that connects Louisville and Lexington to Chicago, Nashville, Cincinnati, and Atlanta. Kentucky imposes a unique state-specific fee on commercial carriers: the Kentucky Weight Distance Tax (KYU), a mileage-based tax assessed on vehicles with a registered gross weight of 60,000 lbs or more operating in Kentucky. This is distinct from IFTA fuel tax reporting and requires a separate KYU number and quarterly weight distance tax return filed with the Kentucky Transportation Cabinet. The Cabinet also administers IRP and IFTA. Oversize/overweight permits are issued by the Kentucky DOT. The state's coal and bourbon industries generate significant specialized freight movements, particularly in eastern Kentucky's mountain corridors and the Bluegrass region. Carriers on eastern Kentucky routes should account for steep grades, narrow roads, and seasonal weight restrictions on secondary routes serving coal country.
| GVWR | 80,000 lbs federal interstate standard |
| Single axle | 20,000 lbs |
| Tandem axle | 34,000 lbs |
Standard federal weight limits apply on Interstate routes. Overweight permits available from Kentucky Transportation Cabinet for non-standard loads. Eastern Kentucky secondary routes serving coal areas may have lower posted limits.
State trucking association: Kentucky Trucking Association
The KYU is a state-specific mileage-based tax assessed on commercial vehicles with a registered gross weight of 60,000 lbs or more operating in Kentucky. Carriers must obtain a KYU number from the Kentucky Transportation Cabinet and file quarterly returns reporting miles traveled in the state. It is separate from IFTA fuel tax obligations.
Yes. If your vehicle meets the 60,000 lb threshold, you need both: IFTA credentials for fuel tax reporting and a KYU number for the weight distance tax. Both are administered by the Kentucky Transportation Cabinet but require separate registrations and quarterly filings.
UPS Worldport processes millions of packages nightly, generating continuous ground freight movements between the air hub and road carriers. Drayage carriers serving Worldport must pre-register with UPS and comply with terminal access protocols and appointment windows.
Eastern Kentucky's coal-producing regions are served by a mix of state and county roads with lower weight ratings than Interstate routes. Overweight permits for coal hauls are available from the Kentucky Transportation Cabinet but are route-specific. Carriers should verify permits before entering mountain corridor routes.