California State Assembly. "An act to add Section 557 to the Streets and Highways Code, relating to state highways". 1956 Session of the Legislature, 1st extraordinary session. Statutes of California. State of California. Ch. 63 p. 454.: "Route 237 is Junipero Serra Boulevard as it exists and as it was constructed by Joint Highway District No. 10 from its junction with State Highway Route No. 56 in Daly City, to the present terminus of said highway in the City of San Bruno."
California State Assembly. "An act to add Section 559 to the Streets and Highways Code, relating to state highways, declaring the urgency thereof, to take effect immediately". 1957 Session of the Legislature. Statutes of California. State of California. Ch. 23 p. 578.: "Route 239 is from a point on Route 56 near Daly City to a point on Route 2 near San Jose..." "The Federal Interstate System of Highways, to be financed primarily with funds provided by the Federal Highway Revenue Act of 1956, includes a circumferential freeway around San Francisco Bay...It is necessary that a new route be added to the State Highway System for portions of said freeway."
