Section 824.240 - Payment when public highway involved(1) As to all crossings above or below grade constructed on state highways, the proportion of expense to be borne by public authority in interest shall be paid from the state highway funds.(2) Any public authority in interest acting through its governing body may, at its option, by agreement with the Department of Transportation, bear a share of the expense of constructing any railroad crossing above or below grade on a state highway.(3) If federal funds allocated specifically for removal of hazards at hazardous railroad-highway crossings are available for any part of the work to be performed, the Department of Transportation shall cause such funds to be used for such purposes.