La. Roads, Bridges and Ferries § 48:2023
Neither the state nor any state agency, parish, municipality, district, or any other political subdivision or other public entity shall be subject to any claims, liabilities, costs, expenses, or causes of action for any personal injury or damage to property arising out of the construction, operation, or maintenance of any project, or which may happen to occur on any tollway, if such incident giving rise thereto occurs prior to transfer and reversion of ownership of any project from an authority created hereunder to the state or appropriate parish or municipality in accordance with the provisions of this Chapter. Should any suit or other action be filed against an authority created hereunder prior to reversion of a project, such reversion shall be effected as provided in this Chapter but the authority so joined by such action shall continue in existence as provided in R.S. 48:2036(A). No individual member, officer, director, or employee of an authority shall be liable personally for any such claims, liabilities, costs, expenses, or causes of action in any event.
La. Roads, Bridges and Ferries § 48:2023