If any obstruction, such as is mentioned in section one of this article, be not removed by the person who, by himself or agent, caused the same, within ten days after written notice so to do, given on behalf of the state road commission or county court, by the engineer or person in charge of such road, then the person causing the obstruction shall be liable to such commission or county court, as the case may be, in a sum of not less than one nor more than $5 for each day such obstruction remains unremoved after the service of such notice.