Some people have vehicles that they do not operate. In California, its called planned non operation of vehicle (PNO) by the DMV. But a question arises, do you need insurance on your vehicle if it is a PNO?
Technically, a PNO cannot be on the road. It cannot be driven on the road. It cannot be parked on the road. It cannot be on the road at all. So, why would you need insurance?
If your PNO is a classic, or if you are restoring it, you may want to carry comprehensive coverage on the vehicle. This would cover you if the car was stolen or burned. Lets say you leave your car in the garage and there is a house fire. The car is turned into a car-b-que. There is no coverage for that car under your homeowners policy. Thus, you would need an auto policy to cover that vehicle.
Maybe your car is in storage. The vehicle is stolen out of storage. The storage company probably has no coverage for you. Again, comprehensive would cover you.
You should consider covering a PNO vehicle, but only if it has some value. If the car is a 72 Pinto and is PNO because it needs a major overhaul, insurance probably does not make sense. However, if the car is in good condition, or you are rebuilding it, providing coverage may make sense for you.