When the right to establish a public road is acquired by the state, or by any of its agencies or political subdivisions, there may be included in the easement so acquired the power to erect and maintain temporary snow fences as required upon lands adjoining the highway part of which lands have been taken for road purposes. If included, the right to erect and maintain such fences shall be considered in awarding damages, and any award shall be conclusively presumed to include the damages, if any, caused by the right to erect and maintain such fences.