As travelers line up to rent a car this Labor Day weekend, a few steps can help them save on insurance. The Insurance Information Institute, a nonprofit industry-backed group, on Wednesday offered tips to keep costs down.

The California Department of Insurance wants Golden State drivers to drive less, save money and save the planet, all at the same time.

Californians soon may be able to buy pay-as-you-drive auto insurance that links premiums more closely with miles driven and provides an incentive to drive less. The proposal has raised concerns among privacy advocates who worry that ubiquitous “black boxes” in cars could give insurers information on speed and times of day on the road.