In determining whether the required number of persons, necessary to give the board of township trustees jurisdiction, have signed the petition asking for a road improvement, the following persons shall not be counted either for or against the improvement:
All tenants in common of any undivided estate, resident within the county, shall be counted as a unit, and if all are not united, either for or against the improvement, none shall be counted in determining whether the requisite number of persons have signed such petition.
No person signing a petition shall be permitted to withdraw therefrom unless the board finds that there was fraud or misrepresentation in obtaining his signature.
R.C. §5571.06