The commission is hereby vested with power and authority in issuing permits to any of the carriers classified in accordance with RCW 81.80.120 to attach thereto such terms and conditions and to require such insurance or security as it may deem necessary for the protection of the public highways and to be for the best interest of the shipping and the general public. All such regulations and conditions shall be deemed temporary and may be revoked by the commission upon recommendation of the state or county authorities in charge of highway maintenance or safety when in the judgment of such authorities such revocation is required in order to protect the public or preserve the public highways.