The highway was first designated on April 4, 1956 as the  portion of the route from Aransas Pass to Port Aransas, and a 0.7 mile extension in Port Aransas to PR 53 was added to the designation on November 28, 1967.
A major transportation route was established on April 4, 1956, covering the distance from Aransas Pass to Port Aransas, with an additional 0.7-mile section in Port Aransas linked to PR 53 by November 28, 1967.