The governing body of any county that has chosen or hereafter chooses not to be included in the provisions of Article 3 (§ 33.2-324 et seq.) of Chapter 3, whenever it deems that any part of a highway subject to its jurisdiction is no longer required or an existing crossing by any such highway of the lines of a railway company, or any existing crossing by the lines of a railway company of such highway, is no longer necessary as a part of such highway system, may abandon the section of highway or the crossing. The procedure for any such abandonment shall be governed by the provisions applicable to the Board as provided in Articles 1, 2, and 3 (§§ 33.2-900 through 33.2-926) of Chapter 9 and all provisions applicable to the Board shall apply, mutatis mutandis, to the governing body of the county.