Like most states, Kentucky
requires that any vehicle registered in the state must be insured. In fact, Kentucky maintains a database of all registered vehicles in the state and electronically monitors the insurance status
of those vehicles. If your vehicle is found to be uninsured, the state will cancel your registration within 90 days. For your particular situation, you should cancel the registration on the car you don't use and then remove it from your insurance policy. This will help you avoid any legal issues with your state and may help to reduce your auto insurance premium.