The overall mission of the Road Division is to enhance, preserve, and maintain a safe and reliable county road system.

The County is responsible for the maintenance and operation of 1,018 miles of County Maintained Roads, 137 bridges and numerous related appurtenances including: surface drainage facilities, traffic control signs and signals, and pavement markings. Roadways within the County system include unsurfaced rural roads to fully improved minor arterials in an urban environment.

The roads within the County system provide vital economic and social transportation links, which affect the quality of life for all residents within Mendocino County. In order to serve the entire County, the Division has several road maintenance crews that operate out of 7 yards throughout the County: Ukiah, Willits, Laytonville, Covelo, Fort Bragg, Boonville, and Point Arena. There's also a bridge crew which operates out of the Ukiah yard.

The Division is available to handle emergency matters 24 hours a day, seven days a week.