 The other was Route 1255, designated in 1930, which would have traveled southwest along the Gulf Intracoastal Waterway over similar terrain to Larose in neighboring Lafourche Parish.Both routes would have provided Jefferson Parish with shortcuts to various points near the Gulf of Mexico, but neither of these ambitious projects ever came to fruition.LA 45 was created in the 1955 Louisiana Highway renumbering, replacing the branch of Route 30 between Marrero and Lafitte.