The main difference between collision and comprehensive coverage comes down to the question of what the driver controls. Collision insurance will cover events within a motorist's control or when another vehicle collides with your car. Comprehensive coverage generally falls under "acts of God or nature," or things that are typically out of your control when driving. These can include events such as a spooked deer, a heavy hailstorm, or a carjacking.
Each of following insurers who transact business in California are domiciled in California and have their principal place of business in Los Angeles, CA: Farmers Insurance Exchange (#R 201), Fire Insurance Exchange (#1267-4), Truck Insurance Exchange (#1199-9), Mid-Century Insurance Company (#1428-2), Civic Property and Casualty Company (#4241-6), Exact Property and Casualty Company (#4240-8), Neighborhood Spirit Property and Casualty Company (#4242-4).
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?”
Med Pay and bodily injury insurance are two other types of coverage that usually follow the person, not the car. Med Pay coverage pays for any injuries that an insured or his passengers may incur in an accident, regardless of who is at fault. Such coverage usually follows the driver. It is based on people, not the vehicle. In fact, such coverage sometimes covers the insured when he is walking or biking. This coverage also usually follows the driver when he rents a car, because the rental vehicle is a substitute for the insured’s own vehicle. However, Med Pay coverage sometimes follows the car. If the passengers in a vehicle don’t have coverage of their own, Med Pay and PIP coverage can extend to their injuries.
While there are a couple of benefits of collision insurance, the main one is that you can file a claim and receive reimbursement regardless of who was at fault. Collision claims usually get processed faster than property damage claims because the insurance company does not have to spend time investigating who was at-fault. Another benefit is that you only deal with your own insurance company, rather than another insurer with less incentive to pay for your claim. Collision insurance can also be used toward your rental car in most cases, which can spare you from having to buy rental car insurance.