The board of supervisors of the county in which a road improvement and maintenance district is located at any time may revoke the authority of an elected board of directors in order to protect the residents of the district. Any district in which the authority of an elected board of directors is revoked pursuant to this section shall be governed by the board of supervisors as provided by section 48-908 and the board of supervisors shall have the option of calling for new elections for the district board of directors.