The State of Kentucky is one of the four rare states in the USA that charge their own road tax from the commercially traveling vehicles in their states. All the commercial vehicle owners traveling interstate or intrastate in Kentucky with a gross registered vehicle weight of 60,000 pounds and more must register for Kentucky Permits and pay the Kentucky filing quarterly. And although the state of Kentucky is authorized to charge its own road tax, you must also register for other federal taxes and trucking permits, like USDOT.