Specifications include, but are not limited to: Furnish & Install Highway Sheeting Signs D-5. All sign posts shall be Type I and conform to Section 832. All sign blanks shall be aluminum and conform to Section 833. All retroreflective sheeting shall conform to Section 830. The back of each sign shall be permanently marked with a bar code. Apply a 2 inch x 1 inch foil barcode label provided by KYTC in the lower right quadrant of the sign back. For signs where the bottom edge of the sign is not parallel to the ground, the lowest corner of the sign shall be used. The barcode shall be placed no less than one inch and not more than three inches from the sign edges. The barcode shall be placed so that a sign post will not cover the label.