Gribblenation

California State Route 42 was a east/west State Highway located in the greater Los Angeles area.  California State Route 42 was aligned from California State Route 1 near Los Angeles International Airport eastward to via Manchester Boulevard and Firestone Boulevard to Interstate 5 in Norwalk.  The designation of California State Route 42 was an early 1960s numbering swap from California State Route 10 to avoid duplication with Interstate 10.  California State Route 42 was slated to become part of the Century Freeway before the corridor was added to the Interstate System in 1968 as Interstate 105.  Upon the completion of Interstate 105 the surface segments of California State Route 42 were relinquished.  Despite being relinquished California State Route 42 remains signed in places such as above via southbound La Cienega Boulevard ( courtesy M3100 of the AAroads forum ).  Below California State Route 42 can be observed on the 1990 Caltrans Map with a legislat...