An audit says Illinois officials should better manage the state-owned vehicle fleet.

Auditor General William Holland said in a report released Thursday that many of the state's automobiles aren't driven enough to justify having them. The auditor also says two in five vehicles that were personally assigned racked up a lot of commuting miles.

The General Assembly asked Holland to review the state's 16,600-vehicle fleet, which costs $129 million a year.

Holland said one-quarter of the 100 vehicles auditors studied were not driven the 7,000 miles considered the minimum necessary to justify a car.

There are 5,100 vehicles assigned to employees who take them home because they use them so much. But Holland said commutes topped 30% of total mileage on nearly half of them.