The Department of Transportation shall give notice of the time and place of the hearing by posting a notice in the county seat of each county in which any affected portion of the highway is located and shall also post copies of the notice at intervals of not more than one mile along said highway and a notice at each end of the affected portion thereof. Notice of the hearing shall be given for not less than 10 days and the hearing shall be had at the county seat of the county in which the affected highway is situated or at some other place convenient to the portion of the highway affected.