sentences:  The wagon road was codified in 1913 as the northernmost segment of the Pacific Highway, which later became State Road 1 during a 1923 restructuring of the highway system.The United States Numbered Highways were created in 1926 and US 99 was assigned to the Pacific Highway, becoming concurrent with the entire highway, which was replaced by PSH 1 in 1937.PSH 1 and US 99 were replaced during the 1964 highway renumbering by I-5 and Peace Portal Drive was removed from the highway system.