The road from State Route 9 (now State Route 143), at the intersection of County and Mallory Streets in Phoebus, northeast along Mallory Street (then the Mill Creek Road) to the intersection of Point Comfort Avenue and Resort Boulevard at Buckroe Beach, was added to the state highway system in 1923 as State Route 394 (a spur of State Route 39, renumbered from SR 9). In the 1928 renumbering, SR 394 became State Route 512, and in the 1933 renumbering it became State Route 169.