(a) Upon presentation of any petition for a road, or for the alteration or vacation of any road, to the county commissioners, at any regular session of their board, it shall be the duty of such commissioners, if they find the petition to be a legal one, and that the proper bond has been filed, to appoint three disinterested householders of the county as viewers with such commissioners, who may act as viewers of such road, and the county clerk shall give notice by advertisement set up in the county clerk’s office and in every municipal township through which any part of such road is designed to be laid out, altered, or vacated, for at least 20 days, and by publication for two consecutive weeks in a newspaper of general circulation in the county, setting forth that such petition has been presented, giving the substance thereof, and that the commissioners or the viewers, on the day designated, which shall not be more than 20 days after the date of the second publication in the newspaper of the notice herein required, will proceed to view the* such road, and give all parties a hearing.

(b) They shall also cause a record of such notice to be entered on their journal by the county clerk. They shall issue an order directing the county surveyor to meet with them at the time and place named in such notice to survey such road. In case of failure to meet on the day designated, they may meet on the following day, without further notice; and in case of failure to meet within the time herein specified, new notice shall be given as hereinbefore provided; that in all applications for the location, change and relocation of any road to be located upon or along any section line, and the petition shall so state, and shall specify the section lines to be followed, the place of beginning and the place of ending, the survey may be dispensed with, and in case the owners of the lands taken agree in writing to the proposed location, relocation, or change, and the commissioners are satisfied that the location, relocation or change prayed for is practicable, and can be made without unreasonable expense, they may dispense with the viewing of such location, relocation or change of road, and shall order the same to be surveyed, platted and opened, and shall also direct the county surveyor to note such location, relocation or change of roads upon the road records of such county surveyor’s office.