Insurance terms, definitions and explanations are intended for informational purposes only and do not in any way replace or modify the definitions and information contained in individual insurance contracts, policies or declaration pages, which are controlling. Such terms and availability may vary by state and exclusions may apply. Discounts may not be applied to all policy coverages.
Therefore, a very basic and often incorrect answer to the wrong question is that auto liability coverage generally follows the driver, while auto physical damage coverage generally follows the vehicle. However, more often than not, you will be asking the wrong question. As long as a driver has the vehicle owner’s permission to operate the vehicle, the owner’s policy will provide coverage no matter who the driver is. The vehicle owner’s policy should cover injuries and property damage. However, exceptions do exist. In most cases, therefore, the right question to ask would be “Is there insurance coverage under these specific facts?”
There are certainly insurance carriers and policies that will not cover any driver not specifically named in the policy. Other relevant facts include where the “other driver” resides and if they are related to the insured. In general, if someone is living in the insured’s household and regularly drives the insured’s vehicle, many insurance carriers expect you to have that person named on the policy. They will need to undergo the same underwriting and qualification process as any other policyholder.
When an insured borrows a vehicle from a friend, the insured’s liability coverage usually steps in only when the insured’s policy limits are exceeded. Collision and comprehensive coverage do not apply to a borrowed vehicle. Medical Payments (Med Pay) and Personal Injury Protection (PIP) coverage, as we will see below, also follow the insured into a borrowed vehicle.
Comprehensive car insurance covers damages from an "act of God," or events that are not caused by a car driving into something else. An "act of God" can include things like damage from a heavy tree branch falling on your car. Since you have no control over when or why a tree branch would fall on your car, this kind of accident would be covered under your comprehensive policy.