The September/October 1958 California Highways & Public Works featured the completed Long Beach Freeway from US Route 101A/LRN 60 north to the Santa Ana Freeway. The completed 16.5-mile corridor was dedicated on July 10, 1958. The article notes the Long Beach Freeway corridor was first recommended during 1913 as a new highway following the Los Angeles River. The Long Beach Freeway was recognized legislatively on June 23, 1947.
The March/April 1964 California Highways & Public Works features California State Route 7/Seaside Avenue at the Vincent Thomas Bridge toll plaza on Terminal Island.
1965 Legislative Chapter 1372 extended California State 47 over the Vincent Thomas Bridge to California State Route 11 and the Harbor Freeway. The extension California State Route 47 led to California State Route 7 being truncated to California State Route 1. The extended California State Route 47 over the Vicent Thomas Bridge and truncated definition of California State Route 7 first appears on the 1966 Division of Highways Map. The planned extension of the Long Beach Freeway via Seaside Boulevard on Terminal Island is also shown to be withdrawn.