La. Roads, Bridges and Ferries § 48:1274
All motor common carriers and contract carriers that hold certificates of public conveniences and necessity authorizing them to operate over the public roads of this state that will parallel an expressway project or a section thereof on the date that such project is opened to the public for use, are hereby granted the right to operate their vehicles upon and over said expressway project or such section thereof which parallels such public roads under such certificates upon compliance with the payment of the required tolls; provided, that such carriers shall comply with the provisions of this Chapter and any rule and regulation of the authority as to the use of such project, anything in said certificates to the contrary notwithstanding.
La. Roads, Bridges and Ferries § 48:1274