SACRAMENTO, California (AP) — The less California motorists drive, the less they'll pay for auto insurance under a proposed regulation.

State Insurance Commissioner Steve Poizner yesterday announced a plan that will give drivers the option of paying for their automobile insurance based on the miles they drive.

Under the proposed regulations, insurance companies would be able to put devices in vehicles that track miles driven. They would be prohibited from using those devices to track where those vehicles have gone.

So-called pay-as-you-drive auto insurance already is an option in 34 states. Poizner wants insurance companies to start offering it in California by fall 2009.