The regional office of the California Department of Transportation for Inyo, Mono and eastern Kern counties, covering the Eastern Sierra and the US-395 corridor. It maintains and operates state highways in the area and runs road projects such as pavement work in Bishop, Keene, Rock Creek and Lee Vining, the Mammoth Lakes wildlife crossing, and safety improvements at Freeman Gulch. Travelers can check current highway conditions, lane closures and weekly traffic advisories. The district also handles encroachment permits, public records requests and customer service requests, and shares deer migration information. It has hosted a heavy equipment operator training academy in Kern County.