Senate Bill No. 24 designates Interstate 49 in Louisiana as the "Senator J. Bennett Johnston Jr. Memorial Highway." The bill outlines that this designation applies to the entirety of Interstate 49, starting from its intersection with Interstate 10 in Lafayette Parish and extending northward throughout the state.

Additionally, the bill mandates the Department of Transportation and Development (DOTD) to erect and maintain signage for this designation, contingent upon the receipt of local or private funds that cover the department's actual costs for materials and installation. The costs for each sign are capped at $2,250. This legislation is set to take effect on August 1, 2026.