The Secondary Roads Department maintains over 900 miles of paved, gravel, and dirt roads in the county. Year-round maintenance includes plowing snow, laying gravel, grading, and mowing road shoulders along with maintaining all the culverts and bridges and has maintenance shops in various locations around the county.

The County Engineer is the head of the department and issues permits for all new driveways and entrances onto county roads.

An introductory video for permits and forms available at the Johnson County Secondary Roads Department