In this report, we (1) describe various aspects of Caltrans’ vehicle usage, including the types of vehicles the department owns and its policies for employees to drive them; (2) provide an overview of the state’s vehicle liability self‑insurance program in which Caltrans participates; (3) examine the recent increases in Caltrans’ insurance premiums; and (4) identify options to contain the department’s premium costs. In accordance with the reporting language, we focus on Caltrans’ vehicle liability insurance costs in the report, though some of our findings could have implications for vehicle insurance costs for other state departments as well as state liability for other incidents besides vehicle collisions.